[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; <If35Z)~
} nw:-J1kWR
int i1=l; 7V7zGx+Z7
int i2=mid+1; rVnd0K
for(int cur=l;cur<=r;cur++){ "2ru7Y"
if(i1==mid+1) oXsL9,
data[cur]=temp[i2++]; !^c@shLN4
else if(i2>r) b\7iY&.C|
data[cur]=temp[i1++]; $FTO
else if(temp[i1] data[cur]=temp[i1++]; m"eteA,"k_
else )RgGcHT@
data[cur]=temp[i2++]; tz NlJ~E
} cZ8.TsI~
} zmuMWT;
xGk6n4Gg
} o+B:#@9?
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改进后的归并排序: !A3-0zN!
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package org.rut.util.algorithm.support; y] oaO+
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import org.rut.util.algorithm.SortUtil; PUJ2`iP1^3
hB;VCg8
/** |KI UgI
* @author treeroot 4bVO9aUG{
* @since 2006-2-2 <6TT)t<h
* @version 1.0 0fXLcal
*/ ,8'>R@o
public class ImprovedMergeSort implements SortUtil.Sort { @D^^_1~
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private static final int THRESHOLD = 10; U @v*0
PXoz*)tk
/* ?4H#G)F
* (non-Javadoc) Z6C=T;w
* VXBY8;+Yp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pO Iq%0]
*/ eDI=nSo
public void sort(int[] data) { 8LkP)]4^sO
int[] temp=new int[data.length]; IA zZ1#/3
mergeSort(data,temp,0,data.length-1); W<ZK,kv
} ^>x|z.
./vZe_o)j$
private void mergeSort(int[] data, int[] temp, int l, int r) { AFvgbn8Qh
int i, j, k; 4LcX<BU9
int mid = (l + r) / 2; RprKm'b8x`
if (l == r) /'2O.d0}.
return; ) /vhclkb
if ((mid - l) >= THRESHOLD) Dn9w@KO
mergeSort(data, temp, l, mid); ocbB&
else DhLqhME53
insertSort(data, l, mid - l + 1); sAn0bX
if ((r - mid) > THRESHOLD) w>fdQ!RdP
mergeSort(data, temp, mid + 1, r); ^$>XW\yCs
else ~[o4a'
insertSort(data, mid + 1, r - mid); Qp,DL@mp>8
`N//A}9
for (i = l; i <= mid; i++) { cLa]D[H
temp = data; pL=d% m.W
} mMx;yZ
for (j = 1; j <= r - mid; j++) { !rDdd%Z
temp[r - j + 1] = data[j + mid]; w.\w1:d
} O`GsS{$sS
int a = temp[l]; r~-.nb"P
int b = temp[r]; {#P`^g
for (i = l, j = r, k = l; k <= r; k++) { x&Vm!,%:1
if (a < b) { hVT~~n`Rj
data[k] = temp[i++]; )5j;KI%t
a = temp; V3;.{0k
} else { ]?1Y e8>Y<
data[k] = temp[j--]; SnlyUP~P
b = temp[j]; \@3Qi8u//
} 9Ya<My
} 1 2++RkL#
} up3O|lj4
V-I(WzR9y
/** XfE?C:v
* @param data 1be %G [*
* @param l {CG_P,FO
* @param i 3nZ9m
*/ jCAC `
private void insertSort(int[] data, int start, int len) { 4(neKr5\#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =p^He!
} jr7C}B-Fb^
} 87%*+n:?*
} YIt& >
} Md6]R-l@
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堆排序： |{*}|
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package org.rut.util.algorithm.support; X{n- N5*
(`>voi<^
import org.rut.util.algorithm.SortUtil; UX3BeUi.)
b*;"q9u5
/** ^,F;M`[
* @author treeroot b `2|I {
* @since 2006-2-2 ;4M><OS!
* @version 1.0 a07@C
*/ tkQH\5
public class HeapSort implements SortUtil.Sort{ =~Ynz7 /x
)#a[-.OI
/* (non-Javadoc) JXG"M#{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &zQ2M#{82
*/ <Llp\XcZ
public void sort(int[] data) { (Rk_-9_E.
MaxHeap h=new MaxHeap(); +')f6P;t>=
h.init(data); F/m^?{==~*
for(int i=0;i h.remove(); -LDCBc"
System.arraycopy(h.queue,1,data,0,data.length); *#%9Rp2|
} +X`V|E,no
I)q,kP@yY
private static class MaxHeap{ _LAS~x7,
HkV1sT
void init(int[] data){ IX: 25CEI2
this.queue=new int[data.length+1]; w{~+EolK
for(int i=0;i queue[++size]=data; ms($9Lv/
fixUp(size); ~^u16z,
} Wk:hFHs3
} E_F5(xSA
}R3=fbe,\
private int size=0; nJRS.xs
mS#zraJn5
private int[] queue; ccCzu6
%N;!+ ;F_g
public int get() { Tmh(= TB'
return queue[1]; /vY_Y3k#
} !3mA0-!+
I -Xlx<
public void remove() { 6:U$w7P0 e
SortUtil.swap(queue,1,size--); =ji1S}e~p
fixDown(1); AC O)Dt(Y
} GV)<Q^9
file://fixdown A^ _a3$,0
private void fixDown(int k) { OA:%lC!
int j; jENr>$$
while ((j = k << 1) <= size) { O8|5KpXd@
if (j < size %26amp;%26amp; queue[j] j++; KZ!3j_pKy
if (queue[k]>queue[j]) file://不用交换 nd;fy$<J\
break; d!KsNkk
SortUtil.swap(queue,j,k); 1Z[/KJ
k = j; +(xeT+J
} vA$o~?a]/
} 7'wS\/e4a
private void fixUp(int k) { Qr1e@ =B
while (k > 1) { L,d LE-L
int j = k >> 1; TI9UXa:V\
if (queue[j]>queue[k]) w ;daC(:
break; $^&ig
SortUtil.swap(queue,j,k); TF2>4 p
k = j; kc7lc|'z
} mzQ`N}]T:
} b}T6v
zkTp`>9R
} |IunpZV
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} v+jsC`m
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SortUtil： AtR?J"3E
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package org.rut.util.algorithm; t}v2$<!I
b{fQ|QD{^E
import org.rut.util.algorithm.support.BubbleSort; @fuM)B1"
import org.rut.util.algorithm.support.HeapSort; )>D+x5o]
import org.rut.util.algorithm.support.ImprovedMergeSort; g}p;\o
import org.rut.util.algorithm.support.ImprovedQuickSort; V\V)<BARe
import org.rut.util.algorithm.support.InsertSort; \4"S7.% |
import org.rut.util.algorithm.support.MergeSort; `@i5i((
import org.rut.util.algorithm.support.QuickSort; BmHwu{n'
import org.rut.util.algorithm.support.SelectionSort; 9%*wb`&
import org.rut.util.algorithm.support.ShellSort; ~gz^Cdh
Bl9jkq ]
/** `mye}L2I
* @author treeroot xEuN
* @since 2006-2-2 x8;`i$
* @version 1.0 9N%JP+<89
*/ 0Z|FZGRP
public class SortUtil { \5Vde%!$Z
public final static int INSERT = 1; [m+iQVk'
public final static int BUBBLE = 2; IrMl:+t\
public final static int SELECTION = 3; x{NX8lN
public final static int SHELL = 4; nC {K$
public final static int QUICK = 5; l!#m&'16"
public final static int IMPROVED_QUICK = 6; aA-
public final static int MERGE = 7; GE|+fYVM-$
public final static int IMPROVED_MERGE = 8; m]*Bx%-1c
public final static int HEAP = 9; fw oQ'&
3]-_q"Co4f
public static void sort(int[] data) { <o2r~E0r3
sort(data, IMPROVED_QUICK); <8UYhGK
} jlFk@:y4
private static String[] name={ 10#oG{9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3D9!M-
}; Z ,^9Z
iR$<$P5
private static Sort[] impl=new Sort[]{ >:=|L%]s;\
new InsertSort(), :b[` v
new BubbleSort(), `>DP,D)w(
new SelectionSort(), *&AfR8x_z
new ShellSort(), s] /tYJYl
new QuickSort(), 1Y_w5dU
new ImprovedQuickSort(), ]]}tdn_
new MergeSort(), I8OD$`~*U6
new ImprovedMergeSort(), +!f=jg06
new HeapSort() H"2uxhdLK3
}; OL7_'2_z.
5 ,0d
public static String toString(int algorithm){ E&yD8=vw
return name[algorithm-1]; tweY'x.{
} 6io, uh!
$4jell
public static void sort(int[] data, int algorithm) { 1B*WfP~
impl[algorithm-1].sort(data); K.gEj*@
} w@2Vts
J==SZ v
public static interface Sort { !~_zm*CqbZ
public void sort(int[] data); = sAn,ri
} `ovtHl3Q
K!D o8|
public static void swap(int[] data, int i, int j) { B*!WrB:s
int temp = data; H7i$xWs
data = data[j]; z}SND9-"
data[j] = temp; Qy#)Gxp
} `"vZ);i<
} wix5B@