[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; '}@e5^oL
} 3V"dG1?
int i1=l; q$3HvZP
int i2=mid+1; kGruo5A
for(int cur=l;cur<=r;cur++){ CJ0$;et
if(i1==mid+1) nhp)yW
data[cur]=temp[i2++]; x Ridc^
else if(i2>r) ?-4OfGN
data[cur]=temp[i1++]; 2$iw/r
else if(temp[i1] data[cur]=temp[i1++]; QZ#3Bn%B5
else @h!U
data[cur]=temp[i2++]; cxL,]27Bu
} s87 a%
} ,!jR:nApE
>'ie!VW@
} f(^33k
^NY+wR5Sn
改进后的归并排序: 7xz#D4[
|}:e+?{o
package org.rut.util.algorithm.support; bGhhh/n
LH bZjZ2
import org.rut.util.algorithm.SortUtil; %f_FGh
tP&{ J^G
/** b8eDD+ulk
* @author treeroot gQu\[e%mVo
* @since 2006-2-2 eB)UXOu1
* @version 1.0 ZDW,7b%U
*/ )hePN4edj
public class ImprovedMergeSort implements SortUtil.Sort { }<E sS
5%EaX?0h+
private static final int THRESHOLD = 10; /\6}SG;
Hf;RIl2F
/* Dr4?Ow
* (non-Javadoc) WW)_Wh
* oZ?IR#^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qxRT1B]{Wx
*/ 3S;>ki4(0
public void sort(int[] data) { muW`pm
int[] temp=new int[data.length]; Bi'I18<
mergeSort(data,temp,0,data.length-1); 8[vl3C
} I:r($m
pZyb
private void mergeSort(int[] data, int[] temp, int l, int r) { GjG{qR
int i, j, k; c& 9+/JYMo
int mid = (l + r) / 2; l_UXrnm/N
if (l == r) rOs)B21/
return; u?F7L8q]
if ((mid - l) >= THRESHOLD) e{c._zr,
mergeSort(data, temp, l, mid); ,)0/Ec
else cpP.7ZR
insertSort(data, l, mid - l + 1); 9|us<k
if ((r - mid) > THRESHOLD) %Y#[%~|(
mergeSort(data, temp, mid + 1, r); x&mz-
else "Nk`RsW
insertSort(data, mid + 1, r - mid); x0}<n99qE
.%-6&%1
for (i = l; i <= mid; i++) { Tb>IHoil
temp = data; %:yHMEG]'
} ;}UIj{sj*
for (j = 1; j <= r - mid; j++) { 3(oZZz
temp[r - j + 1] = data[j + mid]; I8E\'`:<
} f'7d4
int a = temp[l]; .Y=Z!Q
int b = temp[r]; iKP\/LR<n
for (i = l, j = r, k = l; k <= r; k++) { pZni,<Q
if (a < b) { AJJ%gxqGq
data[k] = temp[i++]; g?k#wj1uH
a = temp; yt]Oj*nn0K
} else { Fm-q=3
data[k] = temp[j--]; sDz)_;;%
b = temp[j]; r4]hS`X~%
} a!s.850@
} ymzPJ??!
} <z~2d
HYa$EE2
/** hlABu)B'1
* @param data _47j9m]f
* @param l r"HbrQn
* @param i X^?|Sz<^E
*/ 7]<F>97
private void insertSort(int[] data, int start, int len) { vV$hGS(f~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p*(U*8Q
} nN(D7wk
} 6!gtve_
} -Z[R S{#+T
} s[vPH8qb
^Yg|P&e(;
堆排序： < e7<t9
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package org.rut.util.algorithm.support; J?|K#<%
l,^i5t'
import org.rut.util.algorithm.SortUtil; q.u[g0h;
V PLCic,T
/** b7>,-O
* @author treeroot [qjAq@@N#q
* @since 2006-2-2 B6Wq/fl/
* @version 1.0 aHVdClD2o
*/ 2Be?5+
public class HeapSort implements SortUtil.Sort{ JsWq._O{/
W>t&N
/* (non-Javadoc) 1DI"LIL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R9|2&pfm(M
*/ 3_R
public void sort(int[] data) { 3<~2"@J
MaxHeap h=new MaxHeap(); QTrlQH&p
h.init(data); yP1Y3Tga=
for(int i=0;i h.remove(); ~t.WwxY+
System.arraycopy(h.queue,1,data,0,data.length); /I`bh
} 'Z(MV&
Npf7p
private static class MaxHeap{ %Mb( c+7
T?p`Y| gl
void init(int[] data){ e!2%ku
this.queue=new int[data.length+1]; $jUS[.S_|I
for(int i=0;i queue[++size]=data; b0zxT9
fixUp(size); U||w6:W5
} 7am/X.
} 6|"!sW`%N
J4*:.8Ki
private int size=0; w50Bq&/jX
08d_DCR
private int[] queue; +|}K5q\
s&QBFyKtJ
public int get() { &Curvc1fm
return queue[1]; TJ%]{%F
} q|]0on~]
W2W2WyPk
public void remove() { U_ ?elz\
SortUtil.swap(queue,1,size--); ,SE$Rh
fixDown(1); DS,FVh".|
} >b!X&JU
file://fixdown CL@h!h554_
private void fixDown(int k) { :+%h
int j; 5shu76
while ((j = k << 1) <= size) { _ \y0 mc4
if (j < size %26amp;%26amp; queue[j] j++; !>Qc2&ZV
if (queue[k]>queue[j]) file://不用交换 vxilQp
break; L->f= 8L
SortUtil.swap(queue,j,k); 6E\\`FE4y
k = j; _c(C;s3o
} BJ.8OU*9]S
} h<^:Nn
private void fixUp(int k) { U<,Kw6K
while (k > 1) { ,Q /nS$
int j = k >> 1; ~&j`9jdOj
if (queue[j]>queue[k]) ?3"D| cS1
break; gA6h5F)_
SortUtil.swap(queue,j,k); ,p/b$d1p
k = j; Y+_5"LV
} 7N59B z
} dD.d?rnZq7
uZiY<(X
} gt t$O
w#G=Z_Tt
} j~L1~@
%[\Ft
SortUtil： !qw=I(
~q_+;W.
package org.rut.util.algorithm; \gI:`>- x
h@m n GE
import org.rut.util.algorithm.support.BubbleSort; }fZ=T4r
import org.rut.util.algorithm.support.HeapSort; moJT8tb
import org.rut.util.algorithm.support.ImprovedMergeSort; y'2kV6TtqD
import org.rut.util.algorithm.support.ImprovedQuickSort; 64\5v?C
import org.rut.util.algorithm.support.InsertSort; :@@A
import org.rut.util.algorithm.support.MergeSort; 1-NX>E5
import org.rut.util.algorithm.support.QuickSort; dj'8x48H2W
import org.rut.util.algorithm.support.SelectionSort; nwZr3r
import org.rut.util.algorithm.support.ShellSort; ,<P[CUD&&
*A1TDc$
/** }jY[| >z
* @author treeroot cVHE}0Xd(
* @since 2006-2-2 %}ApO{
* @version 1.0 EAd:`X,Y
*/ =Z>V}`n
public class SortUtil { Y7t{4P
public final static int INSERT = 1; ^3)2]>pW
public final static int BUBBLE = 2; T;[c<gc/
public final static int SELECTION = 3; , w'$T)
public final static int SHELL = 4; >5@vY?QXO
public final static int QUICK = 5; ;`PkmAg
public final static int IMPROVED_QUICK = 6; ,nChwEn
public final static int MERGE = 7; 7+!7]'V
public final static int IMPROVED_MERGE = 8; CpqSn/
public final static int HEAP = 9; $-9@/%Y
S.F=$z.%
public static void sort(int[] data) { (jE:Q2"
sort(data, IMPROVED_QUICK); whm tEY
} -^jLU FC
private static String[] name={ 1DlcO>#@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V-ouIqnI
}; ExP25T
j]l}K*8(
private static Sort[] impl=new Sort[]{ FeeWZe0i
new InsertSort(), )< a8a@
new BubbleSort(), G*~*2>~
new SelectionSort(), Is6']bYh
new ShellSort(), ^'I5]cRa
new QuickSort(), ^YJ^+:D(
new ImprovedQuickSort(), ^RyTK|SQ
new MergeSort(), o`8+#+@f7
new ImprovedMergeSort(), /e?ux~f|
new HeapSort() HJ1\FO9\
}; KJ^GUqVl
=U7D}n hS-
public static String toString(int algorithm){ 9H%xZ(`vN
return name[algorithm-1]; Y$$?8xr ~
} 2l(j 4~g
AW&s-b%P
public static void sort(int[] data, int algorithm) { l 75{JxZX
impl[algorithm-1].sort(data); O-lh\9{'R
} OZ14-}Lr5
U>-#('
public static interface Sort { |Sv#f2`
public void sort(int[] data); :+^$?[6]
} `L*;58MA
PW//8lsR
public static void swap(int[] data, int i, int j) { >Wit"p
int temp = data; ZFuJ2 :
data = data[j]; @$yYljP
data[j] = temp; cTaD{!zm5
} 6`";)T[G9
} <d&)|W