[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; 9c8zH{T_{
} *_b4j.)ax,
int i1=l; b*qkox;j
int i2=mid+1; $1.iMHb
for(int cur=l;cur<=r;cur++){ Fp4eGuWH#
if(i1==mid+1) f!e8xDfA
data[cur]=temp[i2++]; !(F+~,
else if(i2>r) (\.[pj%-O
data[cur]=temp[i1++]; [yL%+I
else if(temp[i1] data[cur]=temp[i1++]; KM< +9`
else >FFZ8=
data[cur]=temp[i2++]; ?tE}89c
} Wt()DG|[
} ,W5pe#n
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} l!Z>QE`.S
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改进后的归并排序: KMhoG.$Ra
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package org.rut.util.algorithm.support; XJ?|\=]
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import org.rut.util.algorithm.SortUtil; u!oHP
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/** X<K[` =I
* @author treeroot NS-u,5Jt
* @since 2006-2-2 Ud^+a H
* @version 1.0 qi`*4cas*A
*/ B@e,3:
public class ImprovedMergeSort implements SortUtil.Sort { X}0NeG^'O
X|L.fB=
private static final int THRESHOLD = 10; jWiZ!dtUZ
,;;M69c[ x
/* `x~k}
* (non-Javadoc) p*_g0_^
* $%`OJf*k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )9##mUt'}
*/ 6.~HbN
public void sort(int[] data) { !sEI|47{
int[] temp=new int[data.length]; fW!~*Q
mergeSort(data,temp,0,data.length-1); N~EM`d
} BRG1/f d
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private void mergeSort(int[] data, int[] temp, int l, int r) { 35) ]R`f
int i, j, k; dwv xV$Nt
int mid = (l + r) / 2; rl'YyO}2
if (l == r) :IV4]`
return; ;H_yNrwA
if ((mid - l) >= THRESHOLD) # Fw<R'c
mergeSort(data, temp, l, mid); KArf:d
else M ioS
insertSort(data, l, mid - l + 1); )J<Li!3
if ((r - mid) > THRESHOLD) '`T.K<
mergeSort(data, temp, mid + 1, r); @]6)j&
else zOLt)2-<
insertSort(data, mid + 1, r - mid); y^Oj4Y:
8^\DQ&D
for (i = l; i <= mid; i++) { '|':W6m,
temp = data; gEIjG
} r-^Ju6w{
for (j = 1; j <= r - mid; j++) { 7n,nODbJ
temp[r - j + 1] = data[j + mid]; {G&K_~Vj
} YUfuS3sX}
int a = temp[l]; ,(N&%
int b = temp[r]; !9356) cV
for (i = l, j = r, k = l; k <= r; k++) { rVzjLkN^
if (a < b) { }/x `w
data[k] = temp[i++]; a^iefwsNc
a = temp; $.R$I&U
} else { \! Os!s
data[k] = temp[j--]; o ]2=5;)
b = temp[j]; ,COSpq]6
} D2E~c? V
} S-gL]r3G8
} ?#ndMv!$
;Y?7|G97*S
/** {(o\G"\<XY
* @param data , =IbZ
* @param l &?9p\oY[
* @param i SY`NZJK
*/ !vr">@}K
private void insertSort(int[] data, int start, int len) { Os*,@N3t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bnWIB+%_
} ^>.?kh9z
} K*'(;1AiW
} Q5;Km1(
} r9%4q4D?>9
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堆排序： llhJ,wD
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package org.rut.util.algorithm.support; zbddn4bW9
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import org.rut.util.algorithm.SortUtil; ^.mQ~F
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/** &w*.S@ ;
* @author treeroot 6f?5/hq
* @since 2006-2-2 ,'= Y
* @version 1.0 AQ32rJT8c`
*/ 1jh^-d5
public class HeapSort implements SortUtil.Sort{ -1Lh="US
|D$U{5}Mv
/* (non-Javadoc) Sl:Qq!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KG'4;Z5J
*/ !Lb9KDk
public void sort(int[] data) { Kk!D|NKLC
MaxHeap h=new MaxHeap(); #i7!
h.init(data); ~uqJ@#o{
for(int i=0;i h.remove(); 1MRt_*N4
System.arraycopy(h.queue,1,data,0,data.length); xh#ef=Bw
} @0A0\2
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private static class MaxHeap{ 8|dlt$
j08G-_Gjn
void init(int[] data){ Wgq*|teW
this.queue=new int[data.length+1]; ='pssdB
for(int i=0;i queue[++size]=data; Xleoh2&M
fixUp(size); :)q/8 0@
} TiCp2Rsz
} b?CmKiM%
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private int size=0; Al$"k[-Uin
x,2+9CCU
private int[] queue; {p9y{$
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public int get() { wQ2'%T|t
return queue[1]; JR$Dp&]I
} /!eC;qp;[
{3$ge
public void remove() { &Km?(%?
SortUtil.swap(queue,1,size--); [\V]tpl!
fixDown(1); .J%}ROm
} 4eU};Pv
file://fixdown '@AK0No\W
private void fixDown(int k) { JXftQOn
int j; CYEqH2"3
while ((j = k << 1) <= size) { |42E'zH&
if (j < size %26amp;%26amp; queue[j] j++; u&STGc[
if (queue[k]>queue[j]) file://不用交换 s8WA@)L
break; }qc[ysDK]
SortUtil.swap(queue,j,k); zIH[ :
k = j; d7It}7@9
} W2%(a0p
} '#4ya=Ww
private void fixUp(int k) { oE"!
while (k > 1) { 6IPhy.8
int j = k >> 1; 4oT25VH
if (queue[j]>queue[k]) zXbTpm
break; .m;1V6
SortUtil.swap(queue,j,k); lh7{2WQ
k = j; T_[W=9
} >`5iq.v
} fyYv}z
.2.$Rq
} k1$|vzMh
"o<:[c9/
} 9V.)=*0hp
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SortUtil： m1]rLeeEt
zST#X}
package org.rut.util.algorithm; VXn]*Mo
? 4qN>uW=
import org.rut.util.algorithm.support.BubbleSort; Rk"VFe>r
import org.rut.util.algorithm.support.HeapSort; &I:X[=;g
import org.rut.util.algorithm.support.ImprovedMergeSort; 5}*aP
import org.rut.util.algorithm.support.ImprovedQuickSort; xPQO}wKa
import org.rut.util.algorithm.support.InsertSort; 0Ny0#;P
import org.rut.util.algorithm.support.MergeSort; WB6g i2
import org.rut.util.algorithm.support.QuickSort; -*e$>w[.N
import org.rut.util.algorithm.support.SelectionSort; &^63*x;hE
import org.rut.util.algorithm.support.ShellSort; .Z8 x!!Q*
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/** /A_</GYs
* @author treeroot +3si=x\=/
* @since 2006-2-2 [5)1 4% x
* @version 1.0 z.e%AcX
*/ S'Yg!KwX
public class SortUtil { s:*gjoL
public final static int INSERT = 1; Z)P x6\?+
public final static int BUBBLE = 2; u\^<V)
public final static int SELECTION = 3; [53@'@26
public final static int SHELL = 4; Y'Wj7P
public final static int QUICK = 5; A{x&5yX8
public final static int IMPROVED_QUICK = 6; ]8+%57:E
public final static int MERGE = 7; EVgn^,
public final static int IMPROVED_MERGE = 8; 0Hff/~J
public final static int HEAP = 9; {'"A hiR/
KOhy)h+ h
public static void sort(int[] data) { 9.zy`}
sort(data, IMPROVED_QUICK); W$:;MY>0f
} %lv2;-
private static String[] name={ 6}C4 SZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |A'8'z&q
}; u$t*jw\fHg
Fdm7k){A
private static Sort[] impl=new Sort[]{ MukPY2[Am
new InsertSort(), "}7K>|a
new BubbleSort(), kVkV~
new SelectionSort(), <g>_#fz"K
new ShellSort(), r.-NfK4
new QuickSort(), =c-j4xna>
new ImprovedQuickSort(), .X_k[l9
new MergeSort(), >bz}IcZP
new ImprovedMergeSort(), 4mNL;O
new HeapSort() n3isLNvIp
}; *N\U{)b\
n@T4z.*~lA
public static String toString(int algorithm){ Y&Pi`E9=
return name[algorithm-1]; ``w,CP ?
} =<`9T_S 16
^CZn<$
public static void sort(int[] data, int algorithm) { 0J@)?,V-.
impl[algorithm-1].sort(data); k W/3 Aq7r
} nHD4J;l
Ln[R}qD
public static interface Sort { SQ>.P
public void sort(int[] data); ;]Y.2 J
} KNIYar*3
vq(@B
public static void swap(int[] data, int i, int j) { J24UUZ9&$
int temp = data; l= ~]MSwY
data = data[j]; P~ffgzP
data[j] = temp; ^q FFF3<8
} ecA0z c~
} ^uIZs}=+