[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; |aj]]l[@S
} H~:g=Zw
int i1=l; }ee3'LUPX
int i2=mid+1; j`_Z`eG
for(int cur=l;cur<=r;cur++){ 9h<iw\$'
if(i1==mid+1) iztgk/(+G
data[cur]=temp[i2++]; 89W8cJ$yW
else if(i2>r) >n1UK5QD
data[cur]=temp[i1++]; "o@R}_4]q
else if(temp[i1] data[cur]=temp[i1++]; -*2b/=$u
else 3Qp6$m
data[cur]=temp[i2++]; aw7pr464
} {@s6ly].
} 5oOs.(m|*C
[3qJUJM
} >f;oY9 {m
lxBcO/
改进后的归并排序: }}wSns
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package org.rut.util.algorithm.support; [Uj,, y.wB
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import org.rut.util.algorithm.SortUtil; <4^y7]]F
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/** aZmbt,.V
* @author treeroot K%SfTA1TCB
* @since 2006-2-2 D:(h^R0;
* @version 1.0 "T}HH
*/ M[e{(iQ:
public class ImprovedMergeSort implements SortUtil.Sort { luz,z( v
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private static final int THRESHOLD = 10; 4ijZQ
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/* j>~@vq
* (non-Javadoc) (e<p^TJ]
* `2'*E\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K81&BVx/
*/ =g=Vv"B_
public void sort(int[] data) { `$/M\aM%
int[] temp=new int[data.length]; x o72JJ
mergeSort(data,temp,0,data.length-1); 3>z+3!I z
} uW,rmd
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private void mergeSort(int[] data, int[] temp, int l, int r) { 1i Q(q\%
int i, j, k; 5zt5]zl'
int mid = (l + r) / 2; l_2YPon
if (l == r) "||G`%aO+t
return; Z3iX^
if ((mid - l) >= THRESHOLD) ;;LiZlf
mergeSort(data, temp, l, mid); X<H+Z2d
else ~>}7+p ?;
insertSort(data, l, mid - l + 1); Ll^9,G"Tt
if ((r - mid) > THRESHOLD) <a2Kc '
mergeSort(data, temp, mid + 1, r); PU\@^)$
else Ki3wqY
insertSort(data, mid + 1, r - mid); 92*Y( >
MO79FNH2\
for (i = l; i <= mid; i++) { %5<t3H"
temp = data; 2f9%HX(5
} &oDu$%dkT
for (j = 1; j <= r - mid; j++) { 1:"ZS ]i
temp[r - j + 1] = data[j + mid]; TJb&f<
} 4_\]zhS
int a = temp[l]; dr4m}v.
int b = temp[r]; E+eC #!&w
for (i = l, j = r, k = l; k <= r; k++) { _?>f9K$1
if (a < b) { J-Fqw-<aFJ
data[k] = temp[i++]; l`{JxVg
a = temp; Oin:5K)4-
} else { r}t%DH
data[k] = temp[j--]; uTP4r
b = temp[j]; YFW0
} %W$?*Tm
} ?^: xNRE$j
} 1;+(HB
q5~fU$ ,
/** 1)M%]I4
* @param data DFqVZ
* @param l nZUBblRJ)
* @param i i)d'l<RA
*/ i(<do "Am<
private void insertSort(int[] data, int start, int len) { 8f#&CC!L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eadY(-4|I-
} 5W?r04
} +'?axv6e
} %MN>b[z
} fkr; a`<W
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堆排序： Gt?ckMB
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package org.rut.util.algorithm.support; dp>LhTLc
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import org.rut.util.algorithm.SortUtil; (8.|q6Nww
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/** C`C$i>X7^
* @author treeroot ]i:O+t/U
* @since 2006-2-2 C)Hb=
* @version 1.0 ~r>N
*/ 1)=sbFtS
public class HeapSort implements SortUtil.Sort{ orAEVEm
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/* (non-Javadoc) .;9I:YB$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M7n|Z{?(
*/ 1)wzSEV@
public void sort(int[] data) { oNr~8CA`
MaxHeap h=new MaxHeap(); \~ h7
h.init(data); _}wy|T&7k&
for(int i=0;i h.remove(); 4 5\%2un
System.arraycopy(h.queue,1,data,0,data.length); _zj}i1!E"
} LP:C9Ol\
!/MHD
private static class MaxHeap{ m.N/g,
0sKY;(
void init(int[] data){ Ot_xeg;7
this.queue=new int[data.length+1]; P(za8l>
for(int i=0;i queue[++size]=data; ws$!-t4<(
fixUp(size); t6O/Q0_
} AW:WDNQh8n
} mEe JK3D[
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private int size=0; d.uJ}=|
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private int[] queue; ^++ec>
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public int get() { #~^Y2-C#
return queue[1]; I8 {2cM;
} 9:tKRN_D
I 0}+}{M:
public void remove() { E6d0YgfD
SortUtil.swap(queue,1,size--); t,K_!-HX+
fixDown(1); ?Y#0Je
} ,-*oc>
file://fixdown '\X<+Sm'
private void fixDown(int k) { ef=LPCi?
int j; VZ8HnNAbX
while ((j = k << 1) <= size) { Ni[2 p
if (j < size %26amp;%26amp; queue[j] j++; s9Aq-N
if (queue[k]>queue[j]) file://不用交换 YS5Pt)?
break; YQ}bG{V
SortUtil.swap(queue,j,k); Iz\IQa
k = j; PO[ AP%;
} )0JXUC e
} dF%sD|<)
private void fixUp(int k) { %Ot^G%34
while (k > 1) { @OlV6M;qJ
int j = k >> 1; w%[`'_[
if (queue[j]>queue[k]) BJI R !J
break; PuhFbgxy
SortUtil.swap(queue,j,k); :n&n"`D~
k = j; 7uQ-:n
} NK+iLXC
} xA9{o+
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} 6 2r%q^r`i
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} NQ@."8
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SortUtil： JYB<};,
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package org.rut.util.algorithm; 6 ztM(2[
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import org.rut.util.algorithm.support.BubbleSort; )MZQ\8,)]
import org.rut.util.algorithm.support.HeapSort; fr%}|7
import org.rut.util.algorithm.support.ImprovedMergeSort; wU#79:h
import org.rut.util.algorithm.support.ImprovedQuickSort; "1H?1"w~
import org.rut.util.algorithm.support.InsertSort; nkp!kqJ09
import org.rut.util.algorithm.support.MergeSort; t YmR<^
import org.rut.util.algorithm.support.QuickSort; ?2;r#)
import org.rut.util.algorithm.support.SelectionSort; E,nC}f
import org.rut.util.algorithm.support.ShellSort; 7)NQK9~
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/** .4"9o%
* @author treeroot ruLi "d
* @since 2006-2-2 KF|<A@V
* @version 1.0 ]3C&l+m$ot
*/ X'Dg= |
public class SortUtil { Fa$ pr`
public final static int INSERT = 1; qsUlfv9L6
public final static int BUBBLE = 2; UJ_E&7,L
public final static int SELECTION = 3; HKk;oG
public final static int SHELL = 4; dD3I.?DY
public final static int QUICK = 5; Y zXL8
public final static int IMPROVED_QUICK = 6; [}|-%4s
public final static int MERGE = 7; sV/#P<9
public final static int IMPROVED_MERGE = 8; 42?X)n>
public final static int HEAP = 9; Pgs^#(^>
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public static void sort(int[] data) { `<h}Ygo>k/
sort(data, IMPROVED_QUICK); \5$N> 2kO
} _W4i?Bde
private static String[] name={ \$2E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ->x+ p"
}; is%qG?,P
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private static Sort[] impl=new Sort[]{ ~\c]!%)o
new InsertSort(), x)wIGo
new BubbleSort(), zlmb_akJ
new SelectionSort(), 2yhtJ9/
new ShellSort(), [EDw0e
new QuickSort(), >8~+[e
new ImprovedQuickSort(), 4Wq{ch
new MergeSort(), `Njv#K} U
new ImprovedMergeSort(), !Jw
new HeapSort() Af:4 XSO6
}; y(B~)T~e@
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public static String toString(int algorithm){ q79)nhC F
return name[algorithm-1]; Z<Rz}8s
} xQC.ap
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public static void sort(int[] data, int algorithm) { yf!
impl[algorithm-1].sort(data); ^{["]!f#
} Ep0L51Q
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public static interface Sort { l tr=_
public void sort(int[] data); KE+y'j#C3
} 8@|_];9#.
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public static void swap(int[] data, int i, int j) { P$Y< g/s4
int temp = data; [6Uc?Bi
data = data[j]; FS r`Y
data[j] = temp; ^9o;=!D!9
} v9Oyboh(y
} 4^VY