[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; ehj&A+Ip
} ,c_[`q\
int i1=l; o2?[*pa
int i2=mid+1; ry}CND(nB
for(int cur=l;cur<=r;cur++){ 2vWJ|&|p
if(i1==mid+1) B]]_rl,
data[cur]=temp[i2++]; >L#&L?#
else if(i2>r) pc}Q_~e
data[cur]=temp[i1++]; \>nPg5OT
else if(temp[i1] data[cur]=temp[i1++]; VR5$[-E3
else {/12.y=)~
data[cur]=temp[i2++]; # 4`*`)%
} Lu}oC2
} Q)yhpwrX
FX)g\=ov
} }K9Vr!
k7)H%31;
改进后的归并排序: (i>VJr
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package org.rut.util.algorithm.support; oH!sJ&"#_
":?>6'*1
import org.rut.util.algorithm.SortUtil; )K>XLaG)
<QTu"i
/** Y>Q9?>}Q
* @author treeroot -wlob`3
* @since 2006-2-2 3toY#!1Ch
* @version 1.0 /ow/)\/}
*/ VcIsAK".4[
public class ImprovedMergeSort implements SortUtil.Sort { 7qA);N
NS6Bi3~
private static final int THRESHOLD = 10; K$(&Qx}
eSoOJ[&$
/* 9I=J#Hi|+
* (non-Javadoc) Qpiv,n
* %yJL-6U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wA) NB
*/ U#1T HO`
public void sort(int[] data) { kx3H}od]
int[] temp=new int[data.length]; J]nb;4w
mergeSort(data,temp,0,data.length-1); v>.nL(VLjP
} o+`W
%l[Cm4
private void mergeSort(int[] data, int[] temp, int l, int r) { :2Qm*Y&_$V
int i, j, k; O\pqZ`E=s
int mid = (l + r) / 2; b|n%l5 1
if (l == r) #*,Jqr2f
return; =#n05*^
if ((mid - l) >= THRESHOLD) :Y(Yk5
mergeSort(data, temp, l, mid); IV;juFw}G
else inZMq(_@$
insertSort(data, l, mid - l + 1); W"AWhi{h
if ((r - mid) > THRESHOLD) a+szA};
mergeSort(data, temp, mid + 1, r); lYv :
else Hs~M!eK
insertSort(data, mid + 1, r - mid); mJ<rzX
~ygiKsD6b
for (i = l; i <= mid; i++) { jpZX5_o
temp = data; 2V/A%
} =t<!W
for (j = 1; j <= r - mid; j++) { f[.RAHjk
temp[r - j + 1] = data[j + mid]; -]~U_J]
} +cheLc
int a = temp[l]; 2,/("lV@0
int b = temp[r]; djqSW9
for (i = l, j = r, k = l; k <= r; k++) { })g|r9=
if (a < b) { HB{w:
data[k] = temp[i++]; Thn-8DT
a = temp; 4otB1{
} else { MG[?C2KA/
data[k] = temp[j--]; idvEE6I@
b = temp[j]; 'SYjEhvw
} #l2wF>0
} EyI 9$@4
} x^8xz5:O
WTA0S}pT
/** %bZ3^ ub}t
* @param data /$\yAOA'y
* @param l ,[,+ _A
* @param i o B_c6]K
*/ knh^q;q*
private void insertSort(int[] data, int start, int len) { [esjR`u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SEr\ u#
} ^USj9HTK
} gEIjG
} r-^Ju6w{
} K7M7T5<
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堆排序： S"CsY2;
6aK'%K
package org.rut.util.algorithm.support; `O.*qs5
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import org.rut.util.algorithm.SortUtil; u Y V=
KqcelI?-I
/** Itr yiU9
* @author treeroot ]]d9\fw
* @since 2006-2-2 ']u w,b
* @version 1.0 j8M}*1
*/ /(BQzCP9O;
public class HeapSort implements SortUtil.Sort{ w?Nvm?_]
K*'(;1AiW
/* (non-Javadoc) t2BkQ8vr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +NxEx/{
*/ tB&D~M6[
public void sort(int[] data) { p W:[Q\rSj
MaxHeap h=new MaxHeap(); 28d:
h.init(data); oPk2ac
for(int i=0;i h.remove(); ~4=4Ks0
System.arraycopy(h.queue,1,data,0,data.length); Nj %!N
} ~kS~v
@+syD
private static class MaxHeap{ \x(J vDt
4Yt:PN2
void init(int[] data){ (toGU
this.queue=new int[data.length+1]; Dgc[WsCEW
for(int i=0;i queue[++size]=data; J}i$ny_3OB
fixUp(size); FGr0W|?v
} wDem }uO
} ='pssdB
2"'0OQN0\
private int size=0; A_{QY&%m
RB\>$D
private int[] queue; x,2+9CCU
e3F)FTG&
public int get() { H[*.Jd
return queue[1]; )qn =
} X3!btxa%t
F{[2|u(4
public void remove() { 3`n5[RV
SortUtil.swap(queue,1,size--); GJy><'J,!>
fixDown(1); W7l/{a @
} .o:Pe2C
file://fixdown Dd!MG'%hlb
private void fixDown(int k) { 9C-F%te7
int j; >pv~$
while ((j = k << 1) <= size) { Y_p
if (j < size %26amp;%26amp; queue[j] j++; [9z<*@$-
if (queue[k]>queue[j]) file://不用交换 ?.v!RdM+
break; NX@TWBn%
SortUtil.swap(queue,j,k); I =qd\
k = j; cP$b>3O
} 8s?;<6
} >P>.j+o/
private void fixUp(int k) { wx}\0(]Gl
while (k > 1) { F!|Z_6\tv:
int j = k >> 1; l"IBt:
if (queue[j]>queue[k]) qk~QcVg
break; '}P)iS2
SortUtil.swap(queue,j,k); xPQO}wKa
k = j; u 6la
} &^63*x;hE
} .oaW#f}0P
O7s0M?4
} U[U$1LSS
$w[@L7'(
} tI*u"%#t
'bY^=9&|
SortUtil： 1^!=J<`K;
c*~/[:}
package org.rut.util.algorithm; L@CN0ezQs
%dw-}1X
import org.rut.util.algorithm.support.BubbleSort; "SLN8x49(
import org.rut.util.algorithm.support.HeapSort; YwoytoXK
import org.rut.util.algorithm.support.ImprovedMergeSort; Jc`LUJT
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Ar4:iNvX
import org.rut.util.algorithm.support.InsertSort; H!Uy4L~>
import org.rut.util.algorithm.support.MergeSort; ]hF[f|V
import org.rut.util.algorithm.support.QuickSort; .X_k[l9
import org.rut.util.algorithm.support.SelectionSort; F=iz\O!6
import org.rut.util.algorithm.support.ShellSort; "uTzmm$
`9a%}PVQ-
/** TQE3/IL
* @author treeroot K+ufcct
* @since 2006-2-2 k W/3 Aq7r
* @version 1.0 b'Mg
*/ 5SR29Z[
public class SortUtil { hP3I_I[qF}
public final static int INSERT = 1; t.lm`=
public final static int BUBBLE = 2; d!G%n *
public final static int SELECTION = 3; u6t.$a!5
public final static int SHELL = 4; J%j#gyTU
public final static int QUICK = 5; wbd>By(T1
public final static int IMPROVED_QUICK = 6; aODOc J N
public final static int MERGE = 7; g3LAi#m
public final static int IMPROVED_MERGE = 8; t+m$lqm
public final static int HEAP = 9; kSB)}q6a
*ubLuC+b
public static void sort(int[] data) { o2a`4K
sort(data, IMPROVED_QUICK); Q&`$:h.~
} aina6@S
private static String[] name={ mOGcv_L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8*>6+"w
}; :ozHuHJ#
y ?4|jN
private static Sort[] impl=new Sort[]{ _P,fJ`w
new InsertSort(), H'?Bx>X
new BubbleSort(), -("79v>#
new SelectionSort(), Pa0tf:
new ShellSort(), jY87NHg
new QuickSort(), 1ww|km
new ImprovedQuickSort(), &vdGKYs 6
new MergeSort(), v SHb\V#
new ImprovedMergeSort(), &Vnet7LfU
new HeapSort() @iC!Q>D
}; J>!p^|S{
)bi*y`UM]
public static String toString(int algorithm){ @hl5^d"l
return name[algorithm-1]; N<"_5
} >@h0@N
(;~[}"
public static void sort(int[] data, int algorithm) { s8@fZ4
impl[algorithm-1].sort(data); Be8Gx
} @8n0GCv
Tk.MtIs)V}
public static interface Sort { Q}\,7l
public void sort(int[] data); 7 &GhJ^Ku
} pfZn<n5p
8Nci1o
public static void swap(int[] data, int i, int j) { ` mALx! `
int temp = data; w V27
data = data[j]; 6tzZ j:yq
data[j] = temp; Ujq)h:`
} FE/&<g0,:
} [RC|W%<Z>