[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; +PYR
} l&Q@+xb>
int i1=l; "Io-%Su+
int i2=mid+1; b5g^{bzwu
for(int cur=l;cur<=r;cur++){ vasw@Uto)
if(i1==mid+1) HV`u#hZ7C
data[cur]=temp[i2++]; bY`Chb.
else if(i2>r) rREev
data[cur]=temp[i1++]; aJm5`az)
else if(temp[i1] data[cur]=temp[i1++]; -C^qN7Bz
else [9?]|4
data[cur]=temp[i2++]; Q3lVx5G>4
} /_fZ2$/
} xG~-.
9F,XjPK=
} 3sBWtz
1slt[&4N
改进后的归并排序: ve#[LBOC8
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package org.rut.util.algorithm.support; ^R\5'9K!
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import org.rut.util.algorithm.SortUtil; ?Wt_Obl
$o\Uq
/** AF{o=@
* @author treeroot @Ng q+uXm
* @since 2006-2-2 (I`<;
* @version 1.0 r~;.8qs
*/ Fo"'[`
public class ImprovedMergeSort implements SortUtil.Sort { !x:w2
Rx<[bohio
private static final int THRESHOLD = 10; 1?+)T%"
u*;53 43
/* y(#F&^|
* (non-Javadoc) gvZLW!={
* ZG)C#I1;O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;LT#/t)}<
*/ Hi{!<e2
public void sort(int[] data) { Dc>)js|"
int[] temp=new int[data.length]; S67T:ARS
mergeSort(data,temp,0,data.length-1); [/t/694
} .+AO3~Dg
(Gxv?\
private void mergeSort(int[] data, int[] temp, int l, int r) { Q^V`%+
int i, j, k; }Lwj~{
int mid = (l + r) / 2; ZsPBs4<p
if (l == r) Ah2XwFg?
return; 1[`l`Truz
if ((mid - l) >= THRESHOLD) *DoEDw
mergeSort(data, temp, l, mid); d0Kg,HB
else J=]w$e ?.P
insertSort(data, l, mid - l + 1); skP_us~
if ((r - mid) > THRESHOLD) 2|w.A!
mergeSort(data, temp, mid + 1, r); zsRN\U
else j'0*|f^z
insertSort(data, mid + 1, r - mid); M!6bf
IO_H%/v"jC
for (i = l; i <= mid; i++) { <u($!ATb
temp = data; 8QZk0O
} Q}Vho.N@=
for (j = 1; j <= r - mid; j++) { k~?}z.g(
temp[r - j + 1] = data[j + mid]; iii$)4V
} RBgkC+2
int a = temp[l]; c!\y\r
int b = temp[r]; ~O 6~',KD
for (i = l, j = r, k = l; k <= r; k++) { \T]"pE+8l
if (a < b) { !V-SV`+X
data[k] = temp[i++]; n_ez6{
a = temp; >a-+7{};
} else { Q6W)rJ[|
data[k] = temp[j--]; `oz7Q(`
b = temp[j]; w./EJkKI
} >`\*{]
} qiF~I0_0
} g4$%)0x%
ft6^s(t
/** pn7 :")Zx
* @param data CijS=-
* @param l ?Ru`ma\;
* @param i O`0$pn
*/ d=KOV;~);
private void insertSort(int[] data, int start, int len) { #f~a\}$I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l{a&Zy)
} M>J ADt_]
} EXFxiw
} yl 8v&e{
} 9iy|=
Fi/G, [q
堆排序： .-Lqo=o\
8W[]#~77b
package org.rut.util.algorithm.support; S7q&|nI
B;~agr
import org.rut.util.algorithm.SortUtil; rWs5s!l,
r=Q5=(hn
/** Bw=[g&+o1@
* @author treeroot 9|WWA%p
* @since 2006-2-2 wqOhJYc
* @version 1.0 F`Y<(]+
*/ UQcmHZ+lf
public class HeapSort implements SortUtil.Sort{ 7 f*_
Xh/av[Q
/* (non-Javadoc) ZO1J";>u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M<srJ8|'
*/ NFc8"7Mz}
public void sort(int[] data) { WLl9>v^1
MaxHeap h=new MaxHeap(); U}0/V c26
h.init(data); R*0F)M
for(int i=0;i h.remove(); k-e@G'
System.arraycopy(h.queue,1,data,0,data.length); `@D4?8_
} %nh'F6bNgv
VC(|t} L4
private static class MaxHeap{ eFI4(Y
8!SiTOzR?
void init(int[] data){ B,Brmn
this.queue=new int[data.length+1]; &zcjU+n
for(int i=0;i queue[++size]=data; kwR@oVR^
fixUp(size); ZRm\d3x4
} |]cDz
} ~Wm}M
rtx]dc1m
private int size=0; 6{X>9hD
OF/)-}!
private int[] queue; 6S[D"Q94
[9_ (+E[}
public int get() { hY 2PV7"[;
return queue[1]; r&sOM_BUF
} 8Jj0-4]
zpqNmxmF
public void remove() { x 4</\o
SortUtil.swap(queue,1,size--); A_~5|
fixDown(1); \=_q{
} xN8JrZE&
file://fixdown 9/(c cj
private void fixDown(int k) { 2] G$6H
int j; _l=
while ((j = k << 1) <= size) { A]%t0>EL<
if (j < size %26amp;%26amp; queue[j] j++; HbfB[%
if (queue[k]>queue[j]) file://不用交换 Pm(:M:a
break; mS}x2&
SortUtil.swap(queue,j,k); b|o!&9Yyr
k = j; yGGB
} qU*&49X
} {b0&qV
private void fixUp(int k) { ]NV ]@*`tO
while (k > 1) { eSNSnh]'
int j = k >> 1; |;m`874
if (queue[j]>queue[k]) S} Cp&}G{P
break; H&Y{jqua
SortUtil.swap(queue,j,k); 9XqAjez\
k = j; SuH.lCF-g
} A{x 7
} Guw|00w,Q$
DE\bYxJ
} 0/@ X!|X
zZ"U9!T
} 7Ljj#!`lUp
x>,F*3d3
SortUtil： =Z .V+4+
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package org.rut.util.algorithm; 5YI/Ec
vd7N&c9
import org.rut.util.algorithm.support.BubbleSort; AYA&&b
import org.rut.util.algorithm.support.HeapSort; 795Jwv
import org.rut.util.algorithm.support.ImprovedMergeSort; R=9~*9
import org.rut.util.algorithm.support.ImprovedQuickSort; =Cy>$/H64
import org.rut.util.algorithm.support.InsertSort; -N7L#a
import org.rut.util.algorithm.support.MergeSort; Ryba[Fz4Di
import org.rut.util.algorithm.support.QuickSort; AOlt,MNpQ
import org.rut.util.algorithm.support.SelectionSort; ca/o#9:N`:
import org.rut.util.algorithm.support.ShellSort; vV6Lp
d9-mWz(V+
/** r ctSS:1
* @author treeroot |[owNV>
* @since 2006-2-2 ]r6BLZ[%
* @version 1.0 P A6KX5
*/ Z#F,y)YiO
public class SortUtil { ?)mhJ/IT
public final static int INSERT = 1; -<51CDw,
public final static int BUBBLE = 2; )0U3w#,JQ
public final static int SELECTION = 3; }>;ht5/i/
public final static int SHELL = 4; ..q63dr
public final static int QUICK = 5; ?wLdW1&PpX
public final static int IMPROVED_QUICK = 6; =l8!VJa
public final static int MERGE = 7; H\=LE
public final static int IMPROVED_MERGE = 8; RF4$
public final static int HEAP = 9; [EmOA.6
I>H;o{X#
public static void sort(int[] data) { OHHNWg_5
sort(data, IMPROVED_QUICK); 9'n))%CZ.
} ^)OZ`u8
private static String[] name={ h eE'S/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uS,p|}Q&
}; jB%"AvIX
B0)`wsb_
private static Sort[] impl=new Sort[]{ *U;4t/(
new InsertSort(), 5@ bc(H
new BubbleSort(), llHc=&y#
new SelectionSort(), &0+x2e)7g
new ShellSort(), )@Zc?Da
new QuickSort(), G{NSAaD[
new ImprovedQuickSort(), 8ji^d1G,
new MergeSort(), O->_/_
new ImprovedMergeSort(), 7_Ba3+9jpa
new HeapSort() "WYA
}; h_&4p=SQ
;.ysCF
public static String toString(int algorithm){ 5c:'>
return name[algorithm-1]; G&x'=dJ
} Gr5`1`8|
4? m/*VV
public static void sort(int[] data, int algorithm) { i>Z|65
impl[algorithm-1].sort(data); Dq/3E-y5
} M`0(!Q}
N@Xg5huO
public static interface Sort { ug^om{e-
public void sort(int[] data); 9?uqQ
} e7@li<3>d
r0F_;
public static void swap(int[] data, int i, int j) { j\2]M
int temp = data; H1` rM^,%A
data = data[j]; O6y @G .+
data[j] = temp; Ln ~4mN^
} 2Sge
} Bu7A{DRf