[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; PsUO8g'\
} 82,^Pu
int i1=l; RTlC]`IGT
int i2=mid+1; )zO|m7
for(int cur=l;cur<=r;cur++){ 8F>9CO:&N
if(i1==mid+1) ?{'_4n3O
data[cur]=temp[i2++]; T`@brL
else if(i2>r) X% 05[N
data[cur]=temp[i1++]; <J%Z?3@T
else if(temp[i1] data[cur]=temp[i1++]; Kkq-x'gt^
else Y$v d@Q
data[cur]=temp[i2++]; XdA]);,
} I<RARB-j
} ]CNPy$>*
bxYSZCo*
} mQ1
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改进后的归并排序: H^kOwmSzh
5xr>B7MRM?
package org.rut.util.algorithm.support; hkl0N%[
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import org.rut.util.algorithm.SortUtil; TY%c`Q5
g8E5"jpXx3
/** a^LckHPI>
* @author treeroot ZB1%Kn#zo4
* @since 2006-2-2 (5] [L<L
* @version 1.0 IN3-ZNx
*/ }^$#vJ(a7K
public class ImprovedMergeSort implements SortUtil.Sort { ffk>IOH
Sydl[c pH$
private static final int THRESHOLD = 10; W3[>IH"+
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/* vmNo~clt\
* (non-Javadoc) %Y0lMNP
* xkFa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [?N,3
*/ rPy,PQG2w
public void sort(int[] data) { 6t7FklM%
int[] temp=new int[data.length]; j.6!T'$|
mergeSort(data,temp,0,data.length-1); c[2ikI,n[
} G HQ~{
CC^]Y.9
private void mergeSort(int[] data, int[] temp, int l, int r) { .*6NqX$
int i, j, k; 'eBD/w5U
int mid = (l + r) / 2; q1xSylE
if (l == r) '%/=\Q`
return; $hCS-9%&
if ((mid - l) >= THRESHOLD) >|RoLV
mergeSort(data, temp, l, mid); MPnMLUB$\
else *PlKl_nP6
insertSort(data, l, mid - l + 1); $W}:,]hoj
if ((r - mid) > THRESHOLD) JcYY*p
mergeSort(data, temp, mid + 1, r); #QsJr_=
else Hc8^w6S1@
insertSort(data, mid + 1, r - mid); D8! Y0
*VXx\&
for (i = l; i <= mid; i++) { Pi1LOCq
temp = data; G)YmaHeI;[
} - s'W^(
for (j = 1; j <= r - mid; j++) { Q'jGNWep
temp[r - j + 1] = data[j + mid]; 7./-|#
} vG6*[c8
int a = temp[l]; 'wFhfZB1!B
int b = temp[r]; 9[\do@
for (i = l, j = r, k = l; k <= r; k++) { =/j!S|P
if (a < b) { OH`zeI,[*
data[k] = temp[i++]; Chl^LEN:
a = temp; 1F>8#+B/W
} else { >q?{'#i /
data[k] = temp[j--]; !/H `
b = temp[j]; #l+Rs3T:
} z7BFkZ6+
} ?/T=Gk
} zk3\v "
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/** _~tF2`,Y_p
* @param data f uU"
* @param l \kKd:C{
* @param i .KG9YGL#
*/ euV!U}Xr
private void insertSort(int[] data, int start, int len) { POc<XLZB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ze9n}oN
} W\0u[IV.x
} ODKh/u_
} z^*g2J,
} Iw?f1]
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堆排序： h8M_Uk
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package org.rut.util.algorithm.support; 6NyUGGRq
_7u&.l<;
import org.rut.util.algorithm.SortUtil; +B8oW3v# )
[vuikJP>1k
/** Nf* .r
* @author treeroot Zw4%L?
* @since 2006-2-2 RWu< dY#ym
* @version 1.0 Wn=I[K&&
*/ s!D?%
public class HeapSort implements SortUtil.Sort{ (7,Q4T
Jb9@U/<\
/* (non-Javadoc) GHLFn~z@XJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i&m6;>?`
*/ !jEV75
public void sort(int[] data) { 5i{J0/'Xu)
MaxHeap h=new MaxHeap(); Q;y4yJ$wI
h.init(data); j5n"LC+oz
for(int i=0;i h.remove(); L`O7-'`
System.arraycopy(h.queue,1,data,0,data.length); 45Zh8k
} ./DlHS;
Zs0;92WL
private static class MaxHeap{ 1W0[|Hf2v*
WHjJR
void init(int[] data){ XmVst*2=
this.queue=new int[data.length+1]; S}Z@g
for(int i=0;i queue[++size]=data; f2KH&j>~r
fixUp(size); x6\VIP"9L
} d7&d FvG
} JX>`N5s
F!?f|z,/
private int size=0; &>Y.$eW_
cFjD*r-
private int[] queue; 7FaF]G
[z_ztK1
public int get() { KdTWi;mV2-
return queue[1]; o?= &kx
} >*^SQ{9
PRyzvc~
public void remove() { x=\W TC
SortUtil.swap(queue,1,size--); tk 5p@l
fixDown(1); z^/9YzA!6
} a>Aq/=
file://fixdown ?< Ma4yl</
private void fixDown(int k) { ofYZ!-V
int j; :UKc:JVNM
while ((j = k << 1) <= size) { [oXr6M:
if (j < size %26amp;%26amp; queue[j] j++; 1Z(9<M1!M
if (queue[k]>queue[j]) file://不用交换 g>b{hkIXg
break; =yJV8%pa
SortUtil.swap(queue,j,k); Gt,VSpb~s
k = j; PCH$)F4^
} (v0Q.Q@<
} 5VVU%STP
private void fixUp(int k) { p~(STHDe#
while (k > 1) { "-IF_Hid
int j = k >> 1; -" r4
if (queue[j]>queue[k]) ;D(6Gy9~
break; Z% `$id
SortUtil.swap(queue,j,k); 0uGTc[^^M
k = j; k $# ,^)T
} #>z!ns
} 4^ 0CHy
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} %w!x \UV
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} mZnsr@KF
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SortUtil： +t]Ge >S
:hf%6N='kI
package org.rut.util.algorithm; (K ]wk9a
}_+):<Db
import org.rut.util.algorithm.support.BubbleSort; G}dq ft5"
import org.rut.util.algorithm.support.HeapSort; *^Z -4
import org.rut.util.algorithm.support.ImprovedMergeSort; K'K/}q<
import org.rut.util.algorithm.support.ImprovedQuickSort; ?|Wxqo
import org.rut.util.algorithm.support.InsertSort; Uw)B(;Hy?
import org.rut.util.algorithm.support.MergeSort; O/&Qzt
import org.rut.util.algorithm.support.QuickSort; Nk$|nn9#'
import org.rut.util.algorithm.support.SelectionSort; 6>'>BamX
import org.rut.util.algorithm.support.ShellSort; }Os7[4RW
L5wFbc"u
/** zP$"6~.
* @author treeroot _?Ly7*UML
* @since 2006-2-2 !|J2o8g
* @version 1.0 BY$L[U;@T
*/ qzu(4*Gk6
public class SortUtil { sei%QE]!/
public final static int INSERT = 1; [XP\WG>s
public final static int BUBBLE = 2; W$gjcsv
public final static int SELECTION = 3; D3+<16[,
public final static int SHELL = 4; [|C
public final static int QUICK = 5; T!1XL7
public final static int IMPROVED_QUICK = 6; |Fx~M,Pzg
public final static int MERGE = 7; "DecS:\
public final static int IMPROVED_MERGE = 8; %^u e
public final static int HEAP = 9; i`w&{WTRQ
F]RZP/D`
public static void sort(int[] data) { FlbM(ofY
sort(data, IMPROVED_QUICK); x*:"G'zT
} u*T#? W?
private static String[] name={ 8;3I:z&muQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h,MaF<~
}; &i*e&{L7
b>& 3XDz
private static Sort[] impl=new Sort[]{ /~/nhKm
new InsertSort(), 6""i<oR
new BubbleSort(), d @b ]/
new SelectionSort(), e,*@+E\4
new ShellSort(), aL8Z|*
new QuickSort(), K[q-[q#yc
new ImprovedQuickSort(), PD^Cj?wm
new MergeSort(), ztC,[
new ImprovedMergeSort(), 1E$^ul-v
new HeapSort() V'l9fj*E
}; "Q[?W(SA
;F/w&u.n
public static String toString(int algorithm){ }l5Q0'
return name[algorithm-1]; 87R$Y> V
} =o[H2o y
{t('`z
public static void sort(int[] data, int algorithm) { oe=W}y_k
impl[algorithm-1].sort(data); VexQ ]
} (%4O\s#l
VE^IA\J x
public static interface Sort { X/D% cQ6
public void sort(int[] data); NLev(B:OQH
} Z:VT%-
6 _#CvQ
public static void swap(int[] data, int i, int j) { <07~EP
int temp = data; af=lzKt*
data = data[j]; 6+SaO !lR
data[j] = temp; g:&PjKA
} Gr~J-#a3~D
} yDi'@Z9R?