[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; X?a67qL
} ?,[w6O*
int i1=l; To95WG7G
int i2=mid+1; `^x^= og'
for(int cur=l;cur<=r;cur++){ 6ZJQ '9f
if(i1==mid+1) Pr"ESd>Y
data[cur]=temp[i2++]; z'*>Tk8h
else if(i2>r) c=CXj3
data[cur]=temp[i1++]; c{0?gt.
else if(temp[i1] data[cur]=temp[i1++]; 9:>vl0
else vJs/ett
data[cur]=temp[i2++]; eX/$[SL[
} 3m'6cMQ
} X;0@41t'
nNr3'6lz
} /e,lD)
#;)7~69
改进后的归并排序: bBf+z7iyc
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package org.rut.util.algorithm.support; 9v A`\\9
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import org.rut.util.algorithm.SortUtil; u[u=:Y+
))vwofkw4
/** [S%
* @author treeroot = zSrre
* @since 2006-2-2 _nt%&f
* @version 1.0 6)8']f
*/ HD>{UU?
public class ImprovedMergeSort implements SortUtil.Sort { w>eOERZa
S;C3R5*:
private static final int THRESHOLD = 10; /:DxB00
^/,s$dj
/* XN Y(@
* (non-Javadoc) fHiCuF
* UkC\[$-"\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?{n#j,v!
*/ h(fh |R<
public void sort(int[] data) { LLMkv!%D
int[] temp=new int[data.length]; 2+'&||h
mergeSort(data,temp,0,data.length-1); !dGgLU_
} CfAqMH*ip
TCYnErqk
private void mergeSort(int[] data, int[] temp, int l, int r) { T'XRl@
int i, j, k; ;pNfdII(
int mid = (l + r) / 2; .'4*'i:
if (l == r) :p{iBDA
return; Au {`oxD
if ((mid - l) >= THRESHOLD) 1yo@CaW[\
mergeSort(data, temp, l, mid); q&+GpR
else 'K`)q6m
insertSort(data, l, mid - l + 1); uGv+c.~[j
if ((r - mid) > THRESHOLD) 9}4L8?2
mergeSort(data, temp, mid + 1, r); Lh+^GQ
else 6 3HxQH
insertSort(data, mid + 1, r - mid); lfhB2^^
c/s'&gG33z
for (i = l; i <= mid; i++) { dO=<3W
temp = data; m'S-h'a
} k_skn3,u
for (j = 1; j <= r - mid; j++) { zIL.R#|D=
temp[r - j + 1] = data[j + mid]; Nb$)YMbA
} 3 3V/<v
int a = temp[l]; B!5gD
int b = temp[r]; Awj`6GeJ
for (i = l, j = r, k = l; k <= r; k++) { +"C0de|-
if (a < b) { *33Zt+
data[k] = temp[i++]; N=wB1gJ
a = temp; {d/k0H
} else { rlds-j''
data[k] = temp[j--]; qvT9d7x
b = temp[j]; JeO(sj$e
} 6L2.88 i
} 3A+d8fwi
} +pE-Yn`YS
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/** +>s[w{Svy
* @param data WB= gN:?
* @param l kweypIB
* @param i ;}r#08I
*/ UCl,sn
private void insertSort(int[] data, int start, int len) { iR_X,&p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HK}C<gg
} #vIF]Y
} x1TB (^aX
} FzNs >*
} [Y5B$7|s<
7VR+EV
堆排序： zX)uC<
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package org.rut.util.algorithm.support; &u.t5m7(
"*?^'(yA@
import org.rut.util.algorithm.SortUtil; oas}8A)
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/** ]mYY1%H8M
* @author treeroot mI}1si=$
* @since 2006-2-2 INi(G-!g
* @version 1.0 *;Sj&O
*/ IRD?.K]*
public class HeapSort implements SortUtil.Sort{ !AgW@
KYMz
/* (non-Javadoc) (oxe'\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;jS~0R
*/ '`^`NI`
public void sort(int[] data) { aNw8][
MaxHeap h=new MaxHeap(); ?bW|~<X~
h.init(data); |h4aJv
for(int i=0;i h.remove(); !bRoNP
System.arraycopy(h.queue,1,data,0,data.length); 9*U3uyPi
} %,1bh
7ZqC1
private static class MaxHeap{ Jwgd9a5
>Ta|#]{
void init(int[] data){ 1ti+ Q0~
this.queue=new int[data.length+1]; :[A>O(
for(int i=0;i queue[++size]=data; @WEDXB
fixUp(size); [AA'Ko
} ?%(:
} -YPUrU[)
rzsAnLxo
private int size=0; vu Vcv
U8m/L^zh
private int[] queue; 1<IF@__
Y|stxeOC
public int get() { %a$ l%8j&
return queue[1]; OXAr..
} INt]OPD
8&t3a+8l
public void remove() { [+j}:u
SortUtil.swap(queue,1,size--); qy|[V
fixDown(1); C+tB$yahO
} bh V.uBH
file://fixdown ,aq0Q<}~lc
private void fixDown(int k) { c%tb6@C
int j; J$"3w,O6+U
while ((j = k << 1) <= size) { 6N+]g/_a
if (j < size %26amp;%26amp; queue[j] j++; I5Vp%mCY
if (queue[k]>queue[j]) file://不用交换 qD!qSM
break; /zV&ebN]
SortUtil.swap(queue,j,k); oU"!"t
k = j; #s%_ L
} ^6g^ Q*"
} !W2dMD/
private void fixUp(int k) { dA03,s
while (k > 1) { ]40@yrc
int j = k >> 1; Y-YlQ^
if (queue[j]>queue[k]) L"[2[p
break; Z/G`8|A
SortUtil.swap(queue,j,k); w&F.LiX^
k = j; J> Z.2
} V$o]}|
} s]X0}"cz
rvEX;8TS
} "@ 1+l&
lf2Q
} $@utlIXA'
0)Nu
SortUtil： X\Gbs=sf6
*TyLB&<t
package org.rut.util.algorithm; yor6h@F1
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import org.rut.util.algorithm.support.BubbleSort; `En>o~L;
import org.rut.util.algorithm.support.HeapSort; AJYZ`
import org.rut.util.algorithm.support.ImprovedMergeSort; X:2)C-l?
import org.rut.util.algorithm.support.ImprovedQuickSort; $ VTk0J-W
import org.rut.util.algorithm.support.InsertSort; $Cnv]1%
import org.rut.util.algorithm.support.MergeSort; eXA@J[-M:
import org.rut.util.algorithm.support.QuickSort; (/$a*$
import org.rut.util.algorithm.support.SelectionSort; 2H,n"-9+
import org.rut.util.algorithm.support.ShellSort; r7FFZNs!
^!A@:}t>
/** ;Z6ngS
* @author treeroot 5}Z_A?gy
* @since 2006-2-2 LS%;ZKJ
* @version 1.0 h?7@]&VJ
*/ :meq4!g{1
public class SortUtil { B%(-UTQf
public final static int INSERT = 1; 4Ai#$SHLm
public final static int BUBBLE = 2; fx=HKt
public final static int SELECTION = 3; ab8F\%y-8
public final static int SHELL = 4; H^fErl
public final static int QUICK = 5; }.t8Cy9G
public final static int IMPROVED_QUICK = 6; HDQH7Bs
public final static int MERGE = 7; `xsU'Wd^<
public final static int IMPROVED_MERGE = 8; 7El:$H
public final static int HEAP = 9; )-\[A<(
>A.m`w
public static void sort(int[] data) { gJYX
sort(data, IMPROVED_QUICK); :9]"4ktoJ
} =bh.V@*
private static String[] name={ "t&_!Rm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a&C}'e"
}; Al^h^ 9tJ
\QP1jB
private static Sort[] impl=new Sort[]{ js F96X{
new InsertSort(), J_N`D+m
new BubbleSort(), ZnZ`/zNO
new SelectionSort(), Np2.X+
new ShellSort(), "zx4k8
new QuickSort(), [`U9
new ImprovedQuickSort(), =*=qleC3
new MergeSort(), l g43
new ImprovedMergeSort(), R}0xWPt9G
new HeapSort() {hi'LA-4@
}; Hq."_i{I
50HRgoP5Y
public static String toString(int algorithm){ eGk`Z>
return name[algorithm-1]; >Ni<itze$i
} /2fQM_ ,P
G21cJi*
public static void sort(int[] data, int algorithm) { c5AEn -Q
impl[algorithm-1].sort(data); *c'hmAs
} @ZtDjxN &
@DniYt/
public static interface Sort { uBA84r%{QQ
public void sort(int[] data); [.LbX`K:
} {3){f;b
<p\iB'y
public static void swap(int[] data, int i, int j) { L0EF CQ7
int temp = data; v|#}LQZ
data = data[j]; oa:30@HSb
data[j] = temp; +lED6]+%
} d!#qBn$*[
} THf*<|