[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; r7}KV| M
} nB :iG
int i1=l; ZvC?F=tH
int i2=mid+1; J~`!@!
for(int cur=l;cur<=r;cur++){ ! ,H6.IH;S
if(i1==mid+1) r+#g
data[cur]=temp[i2++]; _^RN$4.R>
else if(i2>r) g%^/^<ei
data[cur]=temp[i1++]; }c=Y<Cdh
else if(temp[i1] data[cur]=temp[i1++]; qJl DQc-
else ZRwN#?x
data[cur]=temp[i2++]; %M8Q6
} Wq1OYZ,
} ei1;@k/
x+'Ea.^
} wM;=^br
q`z1ht nf
改进后的归并排序: {H9g&pfv
oL>o*/
package org.rut.util.algorithm.support; t(.vX
`s=Z{bw
import org.rut.util.algorithm.SortUtil; \7$"i5
*N{k#d/
/** c;yp}k]\
* @author treeroot 4 s9^%K\8{
* @since 2006-2-2 ?TW?2+
* @version 1.0 ^K~=2^sh
*/ v-!Spf
public class ImprovedMergeSort implements SortUtil.Sort { |vG?H#y
_|MK0'+f
private static final int THRESHOLD = 10; :y{@=E=XSC
md\Vw?PkU
/* G2>s#Y5(,
* (non-Javadoc) r`+G9sj3U
* s{Y-Vdx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k"/}9[6:U5
*/ `!ja0Sq]U
public void sort(int[] data) { @K#}nKN'
int[] temp=new int[data.length]; pOl6x iMx
mergeSort(data,temp,0,data.length-1); {Ov{O,c5
} o9]!*Y!RA
brqmi<*9"[
private void mergeSort(int[] data, int[] temp, int l, int r) { k%N$eO$
int i, j, k; UhU+vy6)/
int mid = (l + r) / 2; CzDg?wb
if (l == r) _4k zlD
return; 2j{T8F\]
if ((mid - l) >= THRESHOLD) 8KdcU[w]
mergeSort(data, temp, l, mid); SU~ljAF4
else 1dy"
insertSort(data, l, mid - l + 1); pYUQSsqC
if ((r - mid) > THRESHOLD) mD?={*7%
mergeSort(data, temp, mid + 1, r); N{Pa&/V
else x IL]Y7HWM
insertSort(data, mid + 1, r - mid); I "R<XX
>#.du}t
for (i = l; i <= mid; i++) { ZNDjk
temp = data; ^'b\OUty-
} z<cPy)F]"
for (j = 1; j <= r - mid; j++) { "1Y DT-I"
temp[r - j + 1] = data[j + mid]; +' .o
} h4~VzCR4x\
int a = temp[l]; Vg"vC
int b = temp[r]; +KP&D.wIo
for (i = l, j = r, k = l; k <= r; k++) { M=5hp&=
if (a < b) { `n`HwDo;i
data[k] = temp[i++]; `]/0&S
a = temp; R:44Gv7
} else { i)]^b{5nyB
data[k] = temp[j--]; }$3pS:_N~
b = temp[j]; `TDS4Y
} k& ]I;Aq
} Z?."cuTt
} d}^hZ8k|
Dv=pX.Z+
/** Tx$bg(
* @param data @@6c{r^P
* @param l >H]|R }h
* @param i {>X2\.Rl
*/ c 1{nOx
private void insertSort(int[] data, int start, int len) { msZ3%L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8;(3fSNC
} H+N6VVnO
} )6U^!95
} DC'L-]#<
} l+^4y_
(S63:q&g
堆排序： !z+'mF?V+X
.fNLhyd
package org.rut.util.algorithm.support; N >];xb>
BIjkW.uf
import org.rut.util.algorithm.SortUtil; zi+NQOhR
vyruUYFWe
/** #nS crs@
* @author treeroot }Y3*X:i7
* @since 2006-2-2 di~ [Ivw
* @version 1.0 !=vd:,
*/ 2-@z-XKn
public class HeapSort implements SortUtil.Sort{ FOSC#W9E
jG/@kh*m
/* (non-Javadoc) w+{ o^O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9G{#a#Z.
*/ {6>:=?7]R
public void sort(int[] data) { o?wEX%
MaxHeap h=new MaxHeap(); 7k#0EhN1>
h.init(data); X[1w(dU[
for(int i=0;i h.remove(); b}m@2DR'|m
System.arraycopy(h.queue,1,data,0,data.length); ce1U}">11
} d+IN-lR(
b'(Hwc\ t
private static class MaxHeap{ /wJocx]vQ
rTA#4.*&
void init(int[] data){ 8}|!p>
this.queue=new int[data.length+1]; 6=jL2cqx
for(int i=0;i queue[++size]=data; )3)fq:[
fixUp(size); ~4`3p=$
} X;yThb`iI
} %ERR^
E{IY7Xz^>
private int size=0; X/A(8rvCr
'],G!U(
private int[] queue; lQ?_1H~4=
6@=ipPCR
public int get() { ST[E$XL6
return queue[1]; C&RZdh,$
} '2ACZcjDSv
CWS]821;
public void remove() { XOPiwrg%p
SortUtil.swap(queue,1,size--); 3U[:N &Jb
fixDown(1); x{,W<oXg
} G$6mtw6[M
file://fixdown ;~Q`TWC
private void fixDown(int k) { >$;,1N $bd
int j; E#c9n%E\sz
while ((j = k << 1) <= size) { \NQ[w7
if (j < size %26amp;%26amp; queue[j] j++; 2mfG:^^c
if (queue[k]>queue[j]) file://不用交换 ZEG~ek=jM
break; Vu Ey`c
SortUtil.swap(queue,j,k); lO8GnkLE
k = j; Ksvk5r&y
} ]1|OQYG
} /O[Z
private void fixUp(int k) { =wFl(Q6J
while (k > 1) { L#`X;:
int j = k >> 1; "Q;Vy t
if (queue[j]>queue[k]) (%*~5%l\
break; ]N6UY
SortUtil.swap(queue,j,k); DfVSG1g
k = j; XPMvAZL
} >9X+\eg-
} Q@cYHFi~+
/_tN&[
} C0H@
DN|+d{^lN
} +Q+!#
dXDuO
SortUtil： %WtF\p
]NY^0SqM
package org.rut.util.algorithm; ,-1d2y
E4xybVo@
import org.rut.util.algorithm.support.BubbleSort; qmq#(%Z <W
import org.rut.util.algorithm.support.HeapSort; `k3sl 0z%
import org.rut.util.algorithm.support.ImprovedMergeSort; oX?~
import org.rut.util.algorithm.support.ImprovedQuickSort; g\@zQ^O?
import org.rut.util.algorithm.support.InsertSort; [m9=e-KS$Q
import org.rut.util.algorithm.support.MergeSort; r,wC5%&Za
import org.rut.util.algorithm.support.QuickSort; 3IQ-2 X--
import org.rut.util.algorithm.support.SelectionSort; $2$jV1s
import org.rut.util.algorithm.support.ShellSort; KZ|p_{0&
7h\U}!
/** /@6T~XY M
* @author treeroot (b+o$C
* @since 2006-2-2 l/56;f\IA
* @version 1.0 c1g'l.XL 3
*/ LEY k
public class SortUtil { \Z625jt
public final static int INSERT = 1; TR!7@Mu3
public final static int BUBBLE = 2; >;~ia3
public final static int SELECTION = 3; G[Jz(/yNH
public final static int SHELL = 4; }*vO&J@z
public final static int QUICK = 5; 3s_$.
public final static int IMPROVED_QUICK = 6; *TYOsD**9
public final static int MERGE = 7; ]u"x=S93
public final static int IMPROVED_MERGE = 8; M|qJZ#{4>
public final static int HEAP = 9; FyRr/0C>
5>rjL;
public static void sort(int[] data) { .a}!!\@
sort(data, IMPROVED_QUICK); W! GUA<
} 5hp)Z7
private static String[] name={ pY(S]i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" USbFUHdDc
}; G_6!w//
&u~%5;
private static Sort[] impl=new Sort[]{ 'BNZUuUl
new InsertSort(), oNRp
new BubbleSort(), y(jd$GM|
new SelectionSort(), 49dN~k=
new ShellSort(), \w2X.2b.F
new QuickSort(), 4m6%HV8{}[
new ImprovedQuickSort(), q #X[oVq
new MergeSort(), W";Po)YC
new ImprovedMergeSort(), Lq{/r+tt/
new HeapSort() J24H}^~na
}; )!d_Td\-
&F|Wk,y
public static String toString(int algorithm){ da5fKK/s
return name[algorithm-1]; :A`jRe.
} [};?;YN
>~@ABLp6
public static void sort(int[] data, int algorithm) { 8PvO_Gz5
impl[algorithm-1].sort(data); P;p;o]
} Is}?:ET
WmZ,c_
public static interface Sort { -A1:S'aN-
public void sort(int[] data); "S3U]zw0_
} KZwzQ"Hl
qF4DX$$<
public static void swap(int[] data, int i, int j) { !4mAZF b
int temp = data; HG[gJ7
data = data[j]; {fu[&@XV
data[j] = temp; P:c'W?
} *ZF:LOnU
} jx8hh}C