[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 1ndJ+H0H
} w%c
int i1=l; maSgRf[g
int i2=mid+1; J^m<*
for(int cur=l;cur<=r;cur++){ sT1&e5`W
if(i1==mid+1) ~vgA7E/XV
data[cur]=temp[i2++]; aF8k/$u
else if(i2>r) I,ci >/+b
data[cur]=temp[i1++]; _2hXa!yO
else if(temp[i1] data[cur]=temp[i1++]; k$Rnj`*^
else wU`!B<,j
data[cur]=temp[i2++]; i2Jq|9,g
} [m'CR 4(|
} 2.Yi(r
HFo-4"
} +VU4s$w6
c 5`US
改进后的归并排序: 68R1AqU_
~V)?>)T
package org.rut.util.algorithm.support; ~S; Z\
x`Fjf/1T*m
import org.rut.util.algorithm.SortUtil; 9l+{OA
8cm@a*2%
/** jU=<r
* @author treeroot WxGSv#u
* @since 2006-2-2 8 Op.eYe
* @version 1.0 59rY[&|
*/ o%y;(|4t >
public class ImprovedMergeSort implements SortUtil.Sort { 4B-yTyO
r;iV$Rq!
private static final int THRESHOLD = 10; *(GZ^QH.
8v yG*UK
/* {UH9i'y:t
* (non-Javadoc) U!e6FHj7
* 2L\3S ukj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .tF|YP==
*/ {<w +3Va
public void sort(int[] data) { BH@b1}
int[] temp=new int[data.length]; UP2.]B!d
mergeSort(data,temp,0,data.length-1); */OI*{Q
} :WXf.+IA
x:5dCI
private void mergeSort(int[] data, int[] temp, int l, int r) { ?RD *1
int i, j, k; . p^xS6e{
int mid = (l + r) / 2; A8?[6^%O|
if (l == r) ^uaFg`S
return; 0,FC YTtj$
if ((mid - l) >= THRESHOLD) Ie'P#e'
mergeSort(data, temp, l, mid); X;fy\HaU
else 45}v^|Je\
insertSort(data, l, mid - l + 1); s&*yk p
if ((r - mid) > THRESHOLD) BIWD/|LQ
mergeSort(data, temp, mid + 1, r); qeaA&(|5
else @?&Wm3x9
insertSort(data, mid + 1, r - mid); EychR/s
rhY_|bi4P
for (i = l; i <= mid; i++) { K5ZnS`c;
temp = data; ;R[&pDx
} zp=!8Av
for (j = 1; j <= r - mid; j++) { OM96`
temp[r - j + 1] = data[j + mid]; 'M'w,sID
} K5 vNhA
int a = temp[l]; -S; &Q'Mt
int b = temp[r]; <fM>Yi5
for (i = l, j = r, k = l; k <= r; k++) { ValS8V*N1
if (a < b) { pbB2wt
data[k] = temp[i++]; \~"#ld(x7
a = temp; 6w#nkF
} else { DBbc|I/[l
data[k] = temp[j--]; LXhaD[1Rb
b = temp[j]; Qp:6=o0:
} d$1#<-yP
} 4nX(:K}>
} %"7WXOv&z
n@B{vyy
/** qw:9zYG}qW
* @param data T_L6 t66I
* @param l !p%@Deu
* @param i F+j O*F2h
*/ fuSq ={]
private void insertSort(int[] data, int start, int len) { /GsrGX8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;9rTE|n
} lL2-.!]R
} k\(4sY M
} =g0*MZ;"
} Oje|bxQ
H2\1gNL
堆排序： sX'U|)/pD
7,_-XV2
package org.rut.util.algorithm.support; \j:gr>4
E\e]K !
import org.rut.util.algorithm.SortUtil; ATO 5
nGZ\<-
/** Ff/Ig]Lb
* @author treeroot r%!FmS<
* @since 2006-2-2 mq`5w)S)\o
* @version 1.0 T0L+z/N_m.
*/ A#:8X1w
public class HeapSort implements SortUtil.Sort{ 5fq.*1f
cqg=8$RB
/* (non-Javadoc) `Yogq)G}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 ?2g&B\
*/ n2na9dX)w
public void sort(int[] data) { [a D:A
MaxHeap h=new MaxHeap(); xT+ ;w[s
h.init(data); Z}f^qc+
for(int i=0;i h.remove(); XIN5a~[z*
System.arraycopy(h.queue,1,data,0,data.length); LD@7(?mlU
} 7ti<
;l`X!3
private static class MaxHeap{ lQr6;D}+
-RCv7U`
void init(int[] data){ !d|8'^gc
this.queue=new int[data.length+1]; x[}06k'
for(int i=0;i queue[++size]=data; E8;TLk4\
fixUp(size); *K!7R2Rat
} M5rwoyn
} (+$ol'i
H:E5xz3VQ
private int size=0; ris;Iu^v0
xc*!W*04
private int[] queue; u S(@?m$
[#zE. TW
public int get() { JB'qiuhab
return queue[1]; <"NyC?b+G
} _s@bz|yqw
(l;C%O7*
public void remove() { YZ{jP?x
SortUtil.swap(queue,1,size--); :>ZzP:QD
fixDown(1); zK /f$}
} ^OjvL6A/p
file://fixdown %d-`71|lG^
private void fixDown(int k) { :D^Y?
int j; z-)*Q
while ((j = k << 1) <= size) { 7n<#y;wo
if (j < size %26amp;%26amp; queue[j] j++; 8+L7E-
if (queue[k]>queue[j]) file://不用交换 J2Y 3er
break; xLLC)~
SortUtil.swap(queue,j,k); ,?#*eJD
k = j; FB.!`%{
} S^)WYF5
} yj]ML:n
private void fixUp(int k) { |#:=\gugh
while (k > 1) { w1.MhA
int j = k >> 1; afV P-m4L
if (queue[j]>queue[k]) &Ky3Jb<:Gt
break; ax;{MfsK
SortUtil.swap(queue,j,k); T!&jFy*W
k = j; ->Q`'@'|P
} "?`JA7~g
} B[Ix?V4yy
kYmo7
} vsw7|
lbG}noqb
} j& <tdORT
d{iL?>'?^
SortUtil： +H?<}N*T
QQSH +
package org.rut.util.algorithm; &s2#1
0K`ZX&K?W
import org.rut.util.algorithm.support.BubbleSort; B>ge, }{
import org.rut.util.algorithm.support.HeapSort; '[n)N@h
import org.rut.util.algorithm.support.ImprovedMergeSort; }^IwQm*i
import org.rut.util.algorithm.support.ImprovedQuickSort; f>?^uSpWH
import org.rut.util.algorithm.support.InsertSort; IMw "eV
import org.rut.util.algorithm.support.MergeSort; dp33z"<3
import org.rut.util.algorithm.support.QuickSort; *EX$v4BX
import org.rut.util.algorithm.support.SelectionSort; 1Q0%7zRirI
import org.rut.util.algorithm.support.ShellSort; ;7wwY$PBH
;!^ +N
/** ./';P<)
* @author treeroot (v|ixa
* @since 2006-2-2 p"g1V7B
* @version 1.0 D8q3TyCj%
*/ Rd .U;>
public class SortUtil { J.*[gt%O|
public final static int INSERT = 1; mQmBf|Rl
public final static int BUBBLE = 2; W{L
public final static int SELECTION = 3; ;`;G/1]#9
public final static int SHELL = 4; Z={D0`
public final static int QUICK = 5; [..,(
public final static int IMPROVED_QUICK = 6; xcAF
public final static int MERGE = 7; V@LN 1|
public final static int IMPROVED_MERGE = 8; `WP@ZSC6
public final static int HEAP = 9; |R[v@c`pn
J2)-cY5G
public static void sort(int[] data) { Wk0>1 rlu
sort(data, IMPROVED_QUICK); x:=0.l#
} AlAh S<
private static String[] name={ xI-=tib
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7W6eiUI'
}; `4$4bXrP'
k, $I59
private static Sort[] impl=new Sort[]{ 4!NfQk>X
new InsertSort(), Y]D7i?3N
new BubbleSort(), 3D]2$a_d
new SelectionSort(), Mp]yKl
new ShellSort(), 4jDs0Hn"
new QuickSort(), j` [#Ij
new ImprovedQuickSort(), /UEV8 1
new MergeSort(), BUcaj.S
new ImprovedMergeSort(), h9tB''ePE
new HeapSort() oV%( 37W9=
}; =)mXCA^
#Nu%]
public static String toString(int algorithm){ :;" aUHU'
return name[algorithm-1]; Ib_n'$5#z
} #a|6Q 8
~E^yM=:h
public static void sort(int[] data, int algorithm) { ckH$E%j
impl[algorithm-1].sort(data); KK&<Vw|O\
} ))%@@l[
4iYgs-,
public static interface Sort { |@T5$Xg]5
public void sort(int[] data); ]+^;vc 1r
} s_S<gR
NqQM!B]
public static void swap(int[] data, int i, int j) { ^8o_Iz)r,
int temp = data; 2N8rM}?90
data = data[j]; g:G%Ei~sF
data[j] = temp; "N?%mCPI
} #i`A4D
} XgwMppacw