[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; o: DnZN
} #?|z&9
int i1=l; 'v)+S;oB
int i2=mid+1; 0kEq|k9
for(int cur=l;cur<=r;cur++){ skArocs
if(i1==mid+1) RtEkd_2
data[cur]=temp[i2++]; .v8=zi:7Y
else if(i2>r) ee\zU~
data[cur]=temp[i1++]; \wd`6
else if(temp[i1] data[cur]=temp[i1++]; f 8U;T$)
else j0M;2 3@[
data[cur]=temp[i2++]; </Lqk3S-!
} hZG{"O!2s
} ?7s
M" \y2
} n-WvIy
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改进后的归并排序: l/M+JT~R
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package org.rut.util.algorithm.support; qA[}\8}h
`buTP?]4.
import org.rut.util.algorithm.SortUtil; =7@
k{8N@&D
/** pp_ddk
* @author treeroot l)bUHh5[
* @since 2006-2-2 >H! 2Wflm
* @version 1.0 bsVOO9.4-
*/ L2tmo-]nw
public class ImprovedMergeSort implements SortUtil.Sort { %QkvBg*
?os0JQVB
private static final int THRESHOLD = 10; b6VAyTa
1Qkuxw
/* 3g?T,|2K
* (non-Javadoc) 8ttw!x69)_
* Ric$Xmu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VW/1[?HG5
*/ 9`b3=&i\
public void sort(int[] data) { v]sGdZ(6-
int[] temp=new int[data.length]; 3M`J.>
mergeSort(data,temp,0,data.length-1); T[J_/DE@
} yK;I<8+>_
CQ ?|=cN
private void mergeSort(int[] data, int[] temp, int l, int r) { eIl&=gZ6>
int i, j, k; BC+qeocg
int mid = (l + r) / 2; ~A( Pa-
if (l == r) tL|Q{+i yE
return; W[DB!ue
if ((mid - l) >= THRESHOLD) [ j_jee
mergeSort(data, temp, l, mid); YN3uhd[2
else v4zARE9#
insertSort(data, l, mid - l + 1); wVB8PO8
if ((r - mid) > THRESHOLD) b87d'# .
mergeSort(data, temp, mid + 1, r); re2%e-F"
else a!.8^:B&
insertSort(data, mid + 1, r - mid); F.9|$g*ip
kM@,^`&
for (i = l; i <= mid; i++) { P nDZi
temp = data; P*Nl3?T
} HC$cK+,ZU}
for (j = 1; j <= r - mid; j++) { C2T,1=
temp[r - j + 1] = data[j + mid]; )c_ll;%
} _\zfXHp
int a = temp[l]; JKGZ0yn
int b = temp[r]; 9:>vl0
for (i = l, j = r, k = l; k <= r; k++) { yo=d"*E4^
if (a < b) { yDrJn* r^
data[k] = temp[i++]; 2 r)c?
a = temp; 3]Mx,u
} else { zjS<e XLs[
data[k] = temp[j--]; EWi@1PAZK
b = temp[j]; :yeTzIz]
} ?T&D@Ohsx
} shRvwE[
} r}w 9?s^rB
Kk#@8h>
/** wO9<An
* @param data Z'~FZRF
* @param l t<=L&:<N
* @param i I&9B^fF6
*/ 1zffPC8jl
private void insertSort(int[] data, int start, int len) { sQ$FtKm6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :1I,:L
} PC5FfX
} 6>Fw,$
} 6 9Cxh
} P#C`/%$S
!~#31kL&
堆排序： q]aRJ`9f
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package org.rut.util.algorithm.support; gkjZX wp
n >^?BU
import org.rut.util.algorithm.SortUtil; S_atEmQ
{rDZKy^f
/** uo^>95lkv
* @author treeroot )_ y{^kn3^
* @since 2006-2-2 @QofsWC
* @version 1.0 Q]HRg4r
*/ ?bEYvHAzg
public class HeapSort implements SortUtil.Sort{ L r,$98Dy
w@4+&v>O
/* (non-Javadoc) A@4Cfb@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l d@^$
*/ 5y)kQ<x"
public void sort(int[] data) { Z'~5L_.]Ai
MaxHeap h=new MaxHeap(); &*}S 0
h.init(data); pfG:PrZ
for(int i=0;i h.remove(); YY9q'x,w
System.arraycopy(h.queue,1,data,0,data.length); (.cT<(TB
} d0,I]"
U8dwb
private static class MaxHeap{ S70ERRk
BsAglem
void init(int[] data){ %2{E'^#)p-
this.queue=new int[data.length+1]; LLMkv!%D
for(int i=0;i queue[++size]=data; Y+N87C<
fixUp(size); sr\MQ?\fB
} DmYm~hzJ
} `i}\k
W$&Q.Z
private int size=0; 6 B )
]PFc8qv{
private int[] queue; fAK
?'%&2M zM
public int get() { }5gQZ'ys'
return queue[1]; )\e_I\-
} $]vR,E
z<ek?0?yS
public void remove() { `U1"WcN
SortUtil.swap(queue,1,size--); 3ySnAAG
fixDown(1); 3+Q6<MS q
} IRQ(/:]
file://fixdown X!@Gv:TD
private void fixDown(int k) { `>V.}K^4
int j; ZE9*i}r
while ((j = k << 1) <= size) { /swTn1<Y
if (j < size %26amp;%26amp; queue[j] j++; P _ SJK
if (queue[k]>queue[j]) file://不用交换 _tjH=Ff$
break; %w@(V([(c
SortUtil.swap(queue,j,k); 1>Op)T>{c
k = j; =\3*;59\
} i|<*EXB"
} 4bO7rhve
private void fixUp(int k) { ?;$g,2n
while (k > 1) { XDn$=`2
int j = k >> 1; YpWu\oP
if (queue[j]>queue[k]) 6O"0?wG+
break; &^}w|J?
SortUtil.swap(queue,j,k); '?d[ ip
k = j; E?;W@MJi
} m'S-h'a
} BH}u\K
3RD Q{&J:
} .RT5sj\d
{>i'Pb0mG|
} v4&*iT
71~V*
SortUtil： wxoBq{r;
DCNuvrZ
package org.rut.util.algorithm; U{ Y)\hR-
A_2ppEG
import org.rut.util.algorithm.support.BubbleSort; i,~{{XS<
import org.rut.util.algorithm.support.HeapSort; (<f[$ |%
import org.rut.util.algorithm.support.ImprovedMergeSort; +"C0de|-
import org.rut.util.algorithm.support.ImprovedQuickSort; t+&WsCN
import org.rut.util.algorithm.support.InsertSort; !:>y.^O
import org.rut.util.algorithm.support.MergeSort; 6 2LZ}yn_"
import org.rut.util.algorithm.support.QuickSort; Jlzhn#5c-
import org.rut.util.algorithm.support.SelectionSort; }/=VnCfU
import org.rut.util.algorithm.support.ShellSort; NZl0sX.:
q3;HfZ
/** V7&L+]!
* @author treeroot $}&6p6|
* @since 2006-2-2 JsH9IK:
* @version 1.0 wk3yz6V2
*/ )qKfTtN`
public class SortUtil { n>@(gDq
public final static int INSERT = 1; ^v,^.>P
public final static int BUBBLE = 2; 0uZHH
public final static int SELECTION = 3; Di&tm1R1
public final static int SHELL = 4; ]-O:|q>]
public final static int QUICK = 5; Q{>{ e3z}
public final static int IMPROVED_QUICK = 6; A5z`3T;1
public final static int MERGE = 7; Tx!mW-Lt
public final static int IMPROVED_MERGE = 8; %9M_*]
public final static int HEAP = 9; WB= gN:?
S]<Hx_[}
public static void sort(int[] data) { NZ Xmrc{S
sort(data, IMPROVED_QUICK); E;+3VJ+F"
} U*6r".sz
private static String[] name={ [1s B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y+D#Dv |
}; U#Ud~Q q
t]Oxo`h=
private static Sort[] impl=new Sort[]{ nTLdknh"
new InsertSort(), ?&N JN/+%
new BubbleSort(), #vIF]Y
new SelectionSort(), IQR?n}ce
new ShellSort(), fFsA[@5tul
new QuickSort(), 2"NJt9w
new ImprovedQuickSort(), ?gTY!;$P
new MergeSort(), P2lj#aQLS
new ImprovedMergeSort(), :imp~~L;
new HeapSort() wp} PQw:
}; GU_R6Wt+
-{ZRk[>Z
public static String toString(int algorithm){ <Q%\pAP}b
return name[algorithm-1]; .aNy)Yu8
} l2$6ojpo
Peb;XI
public static void sort(int[] data, int algorithm) { dC)@v]#h
impl[algorithm-1].sort(data); GUMO;rZs
} ?-6oh~W<
mio\}SA
public static interface Sort { 8)T.[AP
public void sort(int[] data); ;Lz96R@}
} 8E|S`I
nqr[HFWs
public static void swap(int[] data, int i, int j) { ~ZT(@w
int temp = data; @q|I$'K]x
data = data[j]; mI}1si=$
data[j] = temp; b]@^SN9
} INi(G-!g
} /-1[}h%U'