[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; lq"X_M$
} -z+,j(@
int i1=l; +B1&bOb
int i2=mid+1; d4BzFGsW
for(int cur=l;cur<=r;cur++){ %Z<{CV
if(i1==mid+1) Q&vdBO/
data[cur]=temp[i2++]; ~G@YA8}
else if(i2>r) ha$1vi}b
data[cur]=temp[i1++]; 65dMv*{
else if(temp[i1] data[cur]=temp[i1++]; d,^ZH
else RZV6;=/
data[cur]=temp[i2++]; *E/ Mf
} ~WTkX(\
} 8ta@@h
C0/^6Lu"o
} {icTfPR4E
("t'XKP&N
改进后的归并排序: ,>rvl P
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package org.rut.util.algorithm.support; X*@ tp,t
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import org.rut.util.algorithm.SortUtil; 6 h#U,G
j\IdB:}j
/** 64mEZ_kG,
* @author treeroot eGq7+
* @since 2006-2-2 6QY;t:/<
* @version 1.0 P9'` 2c
*/ PIa!NPy
public class ImprovedMergeSort implements SortUtil.Sort { ;10YG6:
m!Z<\2OP
private static final int THRESHOLD = 10; O 1z0dHa
4>0q0}J=5
/* 0=3)`v{S@
* (non-Javadoc) X>=`l)ZR
* p__wBUB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ceE]^X;p
*/ c?HUW
public void sort(int[] data) { M)+pH
int[] temp=new int[data.length]; ^_|kEvk0
mergeSort(data,temp,0,data.length-1); y`buY+5l
} ]/1\.<uJId
KH;~VR8"/
private void mergeSort(int[] data, int[] temp, int l, int r) { Dho6N]86r
int i, j, k; 3._ ep
int mid = (l + r) / 2; 6 Ln~b<I
if (l == r) T9Q3I
return; o=($'(1
if ((mid - l) >= THRESHOLD) hA5')te<
mergeSort(data, temp, l, mid); A\Ib
else H,L{N'[Xph
insertSort(data, l, mid - l + 1); \(P?=] -
if ((r - mid) > THRESHOLD) Lcpe*C x-
mergeSort(data, temp, mid + 1, r); 9%T"W
else i^%$ydg
insertSort(data, mid + 1, r - mid); :}v-+eIQ
`T[@-
for (i = l; i <= mid; i++) { g) oOravV
temp = data; Mz6(M,hkq
} 6EyPZ{
for (j = 1; j <= r - mid; j++) { ZK^cG'^2|
temp[r - j + 1] = data[j + mid]; rl%,9JD!
} PmE)FthdP(
int a = temp[l]; G$i)ELs
int b = temp[r]; 950N\Y@u
for (i = l, j = r, k = l; k <= r; k++) { %|(c?`2|
if (a < b) { WsV"`ij#
data[k] = temp[i++]; "g^i%
a = temp; f<@!{y2Xe
} else { GmWr
data[k] = temp[j--]; P+hcj p*
b = temp[j]; ~/`/r%1/J
} &su'znLV
} TSP%5v;Dh
} 0Xh_.PF
Xh;.T=/E|
/** >%U+G0Fq
* @param data \s5Uvws
* @param l |g3:+&
* @param i 32\.-v
*/ aP
private void insertSort(int[] data, int start, int len) { t Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XJ4f;U
} NVv <vu
} YK3>M"58
} wI_@
} QE(.w dHP
mgjJNzclL
堆排序： b]4dmc*N+
MJ)lZ!KZ
package org.rut.util.algorithm.support; #4'wF4DR@
j1K3|E
import org.rut.util.algorithm.SortUtil; w'H'o!*/
l:V R8g[
/** F(HfXY3
* @author treeroot >s{I@#9
* @since 2006-2-2 D9oNYF-V
* @version 1.0 R#d~a;j
*/ Zok{ndO@|f
public class HeapSort implements SortUtil.Sort{ /YvXyi>^"%
Z;.-UXat
/* (non-Javadoc) ]5Uuz?:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [b3!H{b#
*/ QF"7.~~2
public void sort(int[] data) { 9b+jT{Tg
MaxHeap h=new MaxHeap(); ]^~}/@
h.init(data); 2nB99L{6
for(int i=0;i h.remove(); e,p"=/!aY
System.arraycopy(h.queue,1,data,0,data.length); ^&eF916H
} ,@ 8+%KqG
(gBKC]zvz3
private static class MaxHeap{ FXof9fa_B
YJ _eE
void init(int[] data){ C$y6^/7)
this.queue=new int[data.length+1]; YvU%OO-+,
for(int i=0;i queue[++size]=data; cJ96{+
fixUp(size); p`Pa;=L
} ~$HB}/
} Y_'ERqQ
n N<N~
private int size=0; t/iI!}
b&z#ZY
private int[] queue; lYx_8x2
Zo3!Hs ZA
public int get() { ;l@94)@0
return queue[1]; K~ eak\=
} D|LO!,=b
e%\^V\L
public void remove() { Pp8S\%z~h
SortUtil.swap(queue,1,size--); Js,!G
fixDown(1); p27Dcwov
} )O1]|r7v
file://fixdown .Mq#88o.*
private void fixDown(int k) { &K9;GZS?
int j; &uNec(c
while ((j = k << 1) <= size) { _ .vG)
if (j < size %26amp;%26amp; queue[j] j++; } !m43x/&
if (queue[k]>queue[j]) file://不用交换 o^"+X7)
break; q#K{~:
SortUtil.swap(queue,j,k); -N45ni87
k = j; w+br)
} 7OV^>"S
} hw DxGiU
private void fixUp(int k) { AjVC{\Ik
while (k > 1) { m!V,W*RNr
int j = k >> 1; k"N>pjgd$
if (queue[j]>queue[k]) %~LY'cfPse
break; zKQ<Zr
SortUtil.swap(queue,j,k); HGQ</5Z
k = j; sfM"!{7
} FZe/3sY
} =z.j{%
G]K1X"W?
} #I/P9)4
Qa{5]+E
} VdHT3r
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SortUtil： 6j%%CWU{~
U4!bW
package org.rut.util.algorithm; #"gt&t9Q
8Y`Lq$u
import org.rut.util.algorithm.support.BubbleSort; F\:~^`
import org.rut.util.algorithm.support.HeapSort; |a(KVo
import org.rut.util.algorithm.support.ImprovedMergeSort; LE\*33k_
import org.rut.util.algorithm.support.ImprovedQuickSort; (Z),gxt
import org.rut.util.algorithm.support.InsertSort; dN{At-
import org.rut.util.algorithm.support.MergeSort; y~9wxK
import org.rut.util.algorithm.support.QuickSort; O<m46mwM
import org.rut.util.algorithm.support.SelectionSort; @kYY1mv;
import org.rut.util.algorithm.support.ShellSort; _jQ:9,; A
bfxE}>
/** 5nG\J g7
* @author treeroot "Lp.*o
* @since 2006-2-2 W5R/Ub@g
* @version 1.0 m}]{Y'i]R
*/ &;BhL%)}
public class SortUtil { QiPqN$n
public final static int INSERT = 1; _}l(i1o,/
public final static int BUBBLE = 2; .n 9.y8C
public final static int SELECTION = 3; V._-iw]v
public final static int SHELL = 4; 9[eiN
public final static int QUICK = 5; $@AJg
public final static int IMPROVED_QUICK = 6; +:KZEFY?<
public final static int MERGE = 7; i).%GMv*r
public final static int IMPROVED_MERGE = 8; o|xf2k
public final static int HEAP = 9; f1'ByV'2
X5)D[aE6
public static void sort(int[] data) { %z~=Jz^
sort(data, IMPROVED_QUICK); "fu:hHq
} i936+[
private static String[] name={ /]oQqZHv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hjD%=Ri0Z
}; T.}Y&,n$$5
@ Fkhida
private static Sort[] impl=new Sort[]{ v=d16
new InsertSort(), _;M3=MTM9
new BubbleSort(), L3=5tuQ[5
new SelectionSort(), =M=v; ,I-
new ShellSort(), EKus0"|
new QuickSort(), ^B:;uyG]M
new ImprovedQuickSort(), lg +>.^7k
new MergeSort(), R*/s#*gmL
new ImprovedMergeSort(), y9b%P]i
new HeapSort() <*(^QOM
}; LUdXAi"f
!_P&SmK3
public static String toString(int algorithm){ 6EeO\Qj{
return name[algorithm-1]; |j~l%d*<w
} s'|t2`K("
!<24Cy
public static void sort(int[] data, int algorithm) { $*|M+ofQ
impl[algorithm-1].sort(data); cj9C6Y!
} &~=r .T
Zm0'p!
public static interface Sort { 5] LfJh+"n
public void sort(int[] data); z]7/Gc,j
} E>+>!On)b
yzT4D>1,
public static void swap(int[] data, int i, int j) { XBoq/kbw!
int temp = data; dIfy!B"
data = data[j]; Y_K W9T_
data[j] = temp; "}V_.I*+
} IC?(F]$%>
} $<yhEvv