[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; R6>*n!*D@
} &1=,?s]&
int i1=l; Fd80T6[
int i2=mid+1; X=6L-^o)
for(int cur=l;cur<=r;cur++){ hHcevSr
if(i1==mid+1) ~e,K
data[cur]=temp[i2++]; `Has3AX8
else if(i2>r) 1 rbc}e
data[cur]=temp[i1++]; HlkjyD8
else if(temp[i1] data[cur]=temp[i1++]; &.z-itiV
else *"F*6+}w"
data[cur]=temp[i2++]; h<?I?ZR0$
} "FGgem%9
} _h=h43'3
s:,fXg25J
} GO][`zZJ]
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改进后的归并排序: p((.(fx
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package org.rut.util.algorithm.support; ?H!&4o
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import org.rut.util.algorithm.SortUtil; lu.xv6+
w8>bct3@
/** {BAZ`I
* @author treeroot Of-gG~
* @since 2006-2-2 C`3fM05g
* @version 1.0 ^( C,LVP<
*/ ko!aX;K
public class ImprovedMergeSort implements SortUtil.Sort { B1i'Mzm-4
\[+':o`LH
private static final int THRESHOLD = 10; ZWx[@5
#vBSg
/* R5uz<
* (non-Javadoc) [ CU8%%7
* 55>+%@$,a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c No)LF
*/ ,<OS:]
public void sort(int[] data) { Wk-.dJ
int[] temp=new int[data.length]; ND 8;1+3
mergeSort(data,temp,0,data.length-1); b_~KtMO
} 'e x/IqbK
=<=[E:B
private void mergeSort(int[] data, int[] temp, int l, int r) { T z+Y_
int i, j, k; MI8c>5?
int mid = (l + r) / 2; E*9W'e~=
if (l == r) =`gFwH<
return; KHaYb5(a[
if ((mid - l) >= THRESHOLD) u8y('\(
mergeSort(data, temp, l, mid); g@>y`AFnr
else %-!:$ 1;
insertSort(data, l, mid - l + 1); /h&>tYVio
if ((r - mid) > THRESHOLD) ZhoB/TgdL
mergeSort(data, temp, mid + 1, r); ,Qe`(vU*s
else :KRe==/
insertSort(data, mid + 1, r - mid); 63i&e/pv
9B3}LVg\
for (i = l; i <= mid; i++) { *(*XNd||
temp = data; zq#gf
} ooYs0/,{
for (j = 1; j <= r - mid; j++) { zfml^N
temp[r - j + 1] = data[j + mid]; ?nR$>a`
} }T=\hM
int a = temp[l]; ,}Ic($To
int b = temp[r]; AlgVsE%Va
for (i = l, j = r, k = l; k <= r; k++) { VD=F{|^
if (a < b) { n6INI~,
data[k] = temp[i++]; mP)im]H
a = temp; ]b&qC (
} else { ;wr]_@<~
data[k] = temp[j--]; U3c!*i
b = temp[j]; yucbEDO.
} >LR+dShG
} BQ~&gy{
} v{U1B
FCYZ9L5uF
/** gJZ9XLPC
* @param data l)1ySX&BU
* @param l X@B,w_b
* @param i @j4~`~8
*/ eJ$ {`&J
private void insertSort(int[] data, int start, int len) { B;L^!sLP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2) A$bx
} *icxK
} rMUQh~a/
} `qbsDfq@
} Tq >?.bq9
W3i X;-Z
堆排序： |fm"{$u
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package org.rut.util.algorithm.support; 9hs7B!3pc>
!1?Nc}T0Q&
import org.rut.util.algorithm.SortUtil; * @j#13.
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/** gCS%J40r
* @author treeroot F(:]lM|
* @since 2006-2-2 3gmu-tv
* @version 1.0 ps?B;P
*/ .gHL(*1P
public class HeapSort implements SortUtil.Sort{ ;0\
D&&11Iz&
/* (non-Javadoc) )8Sm}aC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5fa_L'L#
*/ {R.@EFkZ
public void sort(int[] data) { *,__\/U98
MaxHeap h=new MaxHeap(); E)l@uPA'1
h.init(data); nbz?D_
for(int i=0;i h.remove(); Rs%6O|u7
System.arraycopy(h.queue,1,data,0,data.length); Wj. _{
} ~x}=lKN
.:s**UiDR
private static class MaxHeap{ 0IjQqI
"Mmvf'N
void init(int[] data){ /!0{9F<
this.queue=new int[data.length+1]; jCbxI^3A
for(int i=0;i queue[++size]=data; %7rWebd-
fixUp(size); o%A@ OY
} ;H8A"$%n~
} Ow]c,F}^
A@"CrVE
private int size=0; Lpdp'9>I
m)?cXM
private int[] queue; eJ!a8
D8Vb@5MW
public int get() { ;HaG-c</
return queue[1]; O ijG@bI8
} PDssEb7
H\<C@OkJS}
public void remove() { nZM|8
SortUtil.swap(queue,1,size--); yf7p0;$?
fixDown(1); N8l(m5Kk,k
} "VcG3.
file://fixdown t1 .6+
private void fixDown(int k) { wBXgzd%L
int j; KArnNmJ9
while ((j = k << 1) <= size) { eESJk14
if (j < size %26amp;%26amp; queue[j] j++; v 1O* Q
if (queue[k]>queue[j]) file://不用交换 hzc2c.gcF
break; 2}Q)&;u
SortUtil.swap(queue,j,k); PRCr7f
k = j; {N$G|bm]u<
} rm4j8~Ef
} UvOB`Vj
private void fixUp(int k) { x_\e&"x
while (k > 1) { @cF aYI
int j = k >> 1; N*My2t_+E
if (queue[j]>queue[k]) IXf@YV
break; _,;c2
SortUtil.swap(queue,j,k); !W8'apG&[
k = j; rf8`|9h"7
} "sRR:wzQu
} .yF7{/
p_QL{gn
} c>r0N[
.)mw~3]
} 9oY%v7
h7 >
SortUtil： p9 |r y+t
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package org.rut.util.algorithm; @$;"nVZ4v
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import org.rut.util.algorithm.support.BubbleSort; ]#[R^t
import org.rut.util.algorithm.support.HeapSort; 6?ylSQ]1
import org.rut.util.algorithm.support.ImprovedMergeSort; OY6lt.t
import org.rut.util.algorithm.support.ImprovedQuickSort; *Oo2rk nQ
import org.rut.util.algorithm.support.InsertSort; |k+Y >I&
import org.rut.util.algorithm.support.MergeSort; y4Plm.
import org.rut.util.algorithm.support.QuickSort; 69,;=
import org.rut.util.algorithm.support.SelectionSort; @K]D :MSS
import org.rut.util.algorithm.support.ShellSort; 3%xj-7z W
SVaC)O(
/** z&d&Ky
* @author treeroot V4Ql6vg_f
* @since 2006-2-2 0=&Hm).
* @version 1.0 ek#{!9-
*/ [>4Ou^=1
public class SortUtil { 1< ;<?
public final static int INSERT = 1; }dE0WJcO
public final static int BUBBLE = 2; ;e_n7>'#%
public final static int SELECTION = 3; ^'C1VQ%
public final static int SHELL = 4; ; eq^m,oz
public final static int QUICK = 5; t8 #&bUX
public final static int IMPROVED_QUICK = 6; X'WbS
public final static int MERGE = 7; 'zZN]P
public final static int IMPROVED_MERGE = 8; q!9SANTx
public final static int HEAP = 9; Ry0n_J:7
zrG&p Z
public static void sort(int[] data) { Qg9 N?e{z
sort(data, IMPROVED_QUICK); }0|,*BkI m
} KyNv)=x4c
private static String[] name={ \ M8;CN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hIC$4lR~
}; X5527`?e
*^Wx=#w$V
private static Sort[] impl=new Sort[]{ 2RidI&?c<
new InsertSort(), ^6|Q$]}Ok
new BubbleSort(), =ex71qj)
new SelectionSort(), NS;,(v{*N
new ShellSort(), X[}5hZcX
new QuickSort(), uG2Hzav
new ImprovedQuickSort(), J(VJMS;_
new MergeSort(), c:4M|t=
new ImprovedMergeSort(), {o4m3[C7=}
new HeapSort() F%t`dz!L
}; sC48o'8(
AY{caM
public static String toString(int algorithm){ ?x"<0k1g
return name[algorithm-1]; Id(L}i(X
} {d(@o!;Fi
kA{[k
public static void sort(int[] data, int algorithm) { Uo<d]4p $
impl[algorithm-1].sort(data); +glT5sOk
} [&y{z-D>
me#VCkr#
public static interface Sort { KZ pqbI Z
public void sort(int[] data); Uoh!1_oV
} kb]PWOz
`[w:l[i
public static void swap(int[] data, int i, int j) { A$Mmnu%
int temp = data; N)03{$WM
data = data[j]; $uF}GP_)
data[j] = temp; >Q#_<IcI
} lzN\~5a}
} AF>J8V