[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; ;>;it5 l=
} ,V^$Meh
int i1=l; ^HtB!Xc
int i2=mid+1; +_u~Np
for(int cur=l;cur<=r;cur++){ ?STO#<a
if(i1==mid+1) "dE[X` }=
data[cur]=temp[i2++]; 4S[)5su
else if(i2>r) s&<76kwl
data[cur]=temp[i1++]; -YmIRocx
else if(temp[i1] data[cur]=temp[i1++]; j)Kd'Va
else 25j\p{*
data[cur]=temp[i2++]; ZLPj1L
} q)KOI`A
} ,'9R/7%s
065=I+Vo
} i}i>ho-8
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改进后的归并排序: Df:/r%
bR~5 :A^
package org.rut.util.algorithm.support; R,=8)OI2
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import org.rut.util.algorithm.SortUtil; s.n:;8RibP
bD|"c
/** 9zrTf%mF
* @author treeroot wzJdS}Yy!y
* @since 2006-2-2 Q&_#R(3j;
* @version 1.0 ;ceg:-Zqo
*/ gjzWW0C
public class ImprovedMergeSort implements SortUtil.Sort { moh,aB#
64`l?F
private static final int THRESHOLD = 10; [?;L
&^uaoB0
/* YI> xxWA
* (non-Javadoc) e"XolM0IM
* g)D@4RM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _@gg,2 u-
*/ W1t_P&i
public void sort(int[] data) { i[{*(Y$L
int[] temp=new int[data.length]; sG[qlzR=8
mergeSort(data,temp,0,data.length-1); VGu(HB8n#
} DIWyv-
>i.$s
private void mergeSort(int[] data, int[] temp, int l, int r) { p>:.js5.a
int i, j, k; Gm=&[?}
int mid = (l + r) / 2; 5 wN)N~JE
if (l == r) =MD)F
return; 6Yt3Oq<U
if ((mid - l) >= THRESHOLD) 9F6dKPN:
mergeSort(data, temp, l, mid); <w8H[y"c
else ;:ZD<'+N
insertSort(data, l, mid - l + 1); _5O~]}
if ((r - mid) > THRESHOLD) (nuTfmt>
mergeSort(data, temp, mid + 1, r); E?|NYu#I6
else R~hIoaiN
insertSort(data, mid + 1, r - mid); 4gdXO
)FIFf;r
for (i = l; i <= mid; i++) { QR8]d1+GV
temp = data; 2Dvq3VbiO"
} Us2> 5 :\
for (j = 1; j <= r - mid; j++) { T2)CiR-b
temp[r - j + 1] = data[j + mid]; f;l}Z|dok6
} -49I3&
int a = temp[l]; k]RQ 7e
int b = temp[r]; vk(I7
for (i = l, j = r, k = l; k <= r; k++) { _D8 zKp
if (a < b) { "[7'i<,AI
data[k] = temp[i++]; 0JR)-*
a = temp; @KLX,1K
} else { Az#kE.8b*A
data[k] = temp[j--]; BePb8 k<y
b = temp[j]; 48G^$T{
} r;H#cMj
} [O!/hppN
} %]tW2s"
2\+N<-(F5
/** DZb0'+jQ
* @param data ~Hj c?*
* @param l 9:Bn-3)
* @param i xt`a":lru
*/ Y(EF )::
private void insertSort(int[] data, int start, int len) { VAyAXN~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n: {f\
} /6n"$qon6
} |Dq?<Ha
} ^%g8OP
} J\'f5)k
?@Tsd@s~r
堆排序： np}0OX
1L\r:mx3
package org.rut.util.algorithm.support; %.\+j,G7
{cdrMP@""
import org.rut.util.algorithm.SortUtil; 16.?45
fJ\u8
/** 7/BjWU5*
* @author treeroot JEZ0O&_R
* @since 2006-2-2 uz=9L<$
* @version 1.0 w&]$!g4
*/ LHA:frC
public class HeapSort implements SortUtil.Sort{ .uN(44^+x
b0se-#+
/* (non-Javadoc) wp4 .~E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c@4$)68
*/ c5i7mx:.
public void sort(int[] data) { j^f54Ky.
MaxHeap h=new MaxHeap(); Uz]=`F8
h.init(data); />>KCmc
for(int i=0;i h.remove(); nI+.De~
System.arraycopy(h.queue,1,data,0,data.length); _l,-SQgj
} N1vA>(2A
V;~\+@
private static class MaxHeap{ TvRm 7
W3%RB[s-
void init(int[] data){ 8e`HXU(A
this.queue=new int[data.length+1]; #}tdA( -
for(int i=0;i queue[++size]=data; Hbu :HFJ!
fixUp(size); UCTc$3
} I:MrX
} PVmePgF
E2S#REB4
private int size=0; 8#1o
c<q~T >0k
private int[] queue; e?]HNy
AOTtAV_e
public int get() { tejpY
return queue[1]; ~)ysEZl
} :)+)L@By
RyWfoLc
public void remove() { @;S)j!m`
SortUtil.swap(queue,1,size--); l)EtK&er(}
fixDown(1); <v\x<ul6
} Ngm/5Lc
file://fixdown FL0yRF5
private void fixDown(int k) { 2mO9
int j; /7-FVqDx8
while ((j = k << 1) <= size) { 8CvNcO;H0
if (j < size %26amp;%26amp; queue[j] j++; nwDGzC~y<
if (queue[k]>queue[j]) file://不用交换 ]RF(0;
break; JX{rum
SortUtil.swap(queue,j,k); `+UBl\j
k = j; 7Q&S [])
} i+I1h=
} /6y;fx
private void fixUp(int k) { P(LiH
while (k > 1) { ykGA.wo7/P
int j = k >> 1; ZiaFByLy
if (queue[j]>queue[k]) KHeeB`V>J
break; 91k-os(4]
SortUtil.swap(queue,j,k); T[J8zLO
k = j; ,V;HMF.
} I.%EYAai
} A[:(#iR5-E
H*",'`|-
} xp]9Z]J1l
i3$pqNe
} N#X* 0i"
}rWg']
SortUtil： SJsbuLxR
?rdWhF]
package org.rut.util.algorithm; %e+*&Z',
5`::#[
import org.rut.util.algorithm.support.BubbleSort; d"lk"R
import org.rut.util.algorithm.support.HeapSort; (:}}p}u
import org.rut.util.algorithm.support.ImprovedMergeSort; acj-*I
import org.rut.util.algorithm.support.ImprovedQuickSort; f{{J_""?&
import org.rut.util.algorithm.support.InsertSort; ]Z[0xs
import org.rut.util.algorithm.support.MergeSort; TA~ZN^xI
import org.rut.util.algorithm.support.QuickSort; J!@R0U.
import org.rut.util.algorithm.support.SelectionSort; V&lx0Dy
import org.rut.util.algorithm.support.ShellSort; NA#,q 8
_k(&<1i
/** qGP}
* @author treeroot =pnQ?2Og
* @since 2006-2-2 LQ||7>{eX
* @version 1.0 '7.4!I0'
*/ o ethO
public class SortUtil { Yt=2HJY
public final static int INSERT = 1; 8<=sUO
public final static int BUBBLE = 2; Qm*XWo
public final static int SELECTION = 3; bfK4ps}m*
public final static int SHELL = 4; NT9|``^Z
public final static int QUICK = 5; ^szi[Cj
public final static int IMPROVED_QUICK = 6; Nc?'},
public final static int MERGE = 7; zqp>Xw
public final static int IMPROVED_MERGE = 8; iMQ0Sq-%1
public final static int HEAP = 9; nL[G@1nR
XaMsIyhI
public static void sort(int[] data) { x]t$Zb/Uxa
sort(data, IMPROVED_QUICK); v <OZ # L$
} $\PU Y8
private static String[] name={ F#.ph?W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SEH[6W3
}; Sar1NkD#
^Ww5@
private static Sort[] impl=new Sort[]{ fm q(!
new InsertSort(), B|'}HBkP
new BubbleSort(), i4&V+h"
new SelectionSort(), QH?sx k2
new ShellSort(), [ B*r{
new QuickSort(), E5Sn mxd
new ImprovedQuickSort(), Z_[L5B]Gwd
new MergeSort(), {xh5s<uOj
new ImprovedMergeSort(), $KlaZ>Dh
new HeapSort() @|e we.r
}; <-,y0Y'
dqO]2d
public static String toString(int algorithm){ %Hhk 6tR,
return name[algorithm-1]; E0+~c1P-
} 2IGU{&s
m7i(0jd +
public static void sort(int[] data, int algorithm) { po.QM/b \
impl[algorithm-1].sort(data); U]g9t<jD
} |I{3~+E h
<`wOy[e
public static interface Sort { [8%q@6[
public void sort(int[] data); m!=5Q S3Z
} m;L3c(r.
>qmNT/
public static void swap(int[] data, int i, int j) { 6~x a^3G:
int temp = data; M}q;\}
data = data[j]; 1aUg({
data[j] = temp; zS h9`F
} cvhwd\
} v5U'ky: