[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; Q?2GwN
} Nu;?})tF
int i1=l; HcQ)XJPK
int i2=mid+1; 7G+E+A5o&
for(int cur=l;cur<=r;cur++){ K>vi9,4/ks
if(i1==mid+1) 6r.#/' "
data[cur]=temp[i2++]; #LR.1zZ
else if(i2>r) ~s{ V!)0
data[cur]=temp[i1++]; {)n@Rq\=v
else if(temp[i1] data[cur]=temp[i1++]; Sq SiuO.D
else ` 7P%muY.
data[cur]=temp[i2++]; X`20=x
} >{)\GK0i7
} nX_w F`n"
d{Cg3v`Rd
} IhHKRb[
RT. %\)))
改进后的归并排序: Alk+MwjR
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package org.rut.util.algorithm.support; E?0Vo%Vh
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import org.rut.util.algorithm.SortUtil; H+ 7HD|GE
tIT/HG_o
/** y8ODoXk
* @author treeroot ,R\ex =c
* @since 2006-2-2 J=J!)\m
* @version 1.0 ^4Uk'T7V
*/ jcp6-XM
public class ImprovedMergeSort implements SortUtil.Sort { skYHPwJdW
VGf&'nL@,
private static final int THRESHOLD = 10; t)5.m}
if?X^j0
/* e>m+@4*sn
* (non-Javadoc) =h70!) Z5
* DYF(O-hJK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {DD #&B
*/ "%YVAaN
public void sort(int[] data) { P(.XB`
int[] temp=new int[data.length]; ;@*<M\O
mergeSort(data,temp,0,data.length-1); {%\@Z-9%q,
} vScEQS$>
j 8)*'T
private void mergeSort(int[] data, int[] temp, int l, int r) { ,e^~(ITaq
int i, j, k; Zu*7t<W
int mid = (l + r) / 2; Z,DSTP\|
if (l == r) 8!{ }WLwb
return; u+O"c
if ((mid - l) >= THRESHOLD) "rrw~
mergeSort(data, temp, l, mid); vm7ag 7@O
else q|}O-A*wa
insertSort(data, l, mid - l + 1); <TTBIXV
if ((r - mid) > THRESHOLD) A34O(fE
mergeSort(data, temp, mid + 1, r); -,Js2+QZ#
else ~z(0XKq0d
insertSort(data, mid + 1, r - mid); nsM.`s@V
rd;E /:`5
for (i = l; i <= mid; i++) { *'*,mfk[
temp = data; ?OPuv5!pI
} |l-O e
for (j = 1; j <= r - mid; j++) { RBfzti6
temp[r - j + 1] = data[j + mid]; V,%K"b=
} IE3GZk+a~
int a = temp[l]; Y4+]5;B8
int b = temp[r]; W!"Oho'
for (i = l, j = r, k = l; k <= r; k++) { rp4{lHw>C/
if (a < b) { aCJ-T8?'
data[k] = temp[i++]; @ULd~
a = temp; (-],VB (+
} else { IR{XL\WF
data[k] = temp[j--]; u_}UU 2
b = temp[j]; K^",LCJA
} 53$;ZO3
} N,Js8Z"
} k(M"k!M
O)ose?Z
/** AV4fN@BX
* @param data XSCcumde!
* @param l ,|GjrT{vf
* @param i 4s9.")G
*/ If]rg+|U
private void insertSort(int[] data, int start, int len) { /'zXb_R,$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p({Lp}'
} `Hq*l"8
} j"jQiL_*
} xLb=^Xjec
} gb4$W@N7V
M?=I{}!@Q
堆排序： Fn0|v66
6b%IPbb
package org.rut.util.algorithm.support; ArjRoXDE
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import org.rut.util.algorithm.SortUtil; 4 aE{}jp1
M(yWE0 3
/** NHQoP&OG
* @author treeroot yVQW|D0,j
* @since 2006-2-2 .<E7Ey#
* @version 1.0 1JJ1!& >
*/ $ce*W9`
public class HeapSort implements SortUtil.Sort{ ;<GK{8
{>PEl;,-
/* (non-Javadoc) B873UN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @LFB}B
*/ t&p I
public void sort(int[] data) { R)4,f~@"
MaxHeap h=new MaxHeap(); #C'E'g0
h.init(data); ?~IdPSY
for(int i=0;i h.remove(); cv1PiIl
System.arraycopy(h.queue,1,data,0,data.length); ,)N/2M\B-
} itE/QB
mfF `K2R
private static class MaxHeap{ x}O,xquY
cs_
void init(int[] data){ [c -|`d^
this.queue=new int[data.length+1]; s(ap~UCOw
for(int i=0;i queue[++size]=data; h6IO;:P)
fixUp(size); u\MxQIo'u
} E!.&y4
} db=S*LUbl
, Y,^vzX6
private int size=0; IlwHHt;njp
<o[3*59
private int[] queue; W'=}2Y$]u
azNv(|eeJL
public int get() { *wsZ aQ
return queue[1]; 4<vi@,s
} I(WIT=Wi<
Y@<jvH1
public void remove() { @nMVs6
SortUtil.swap(queue,1,size--); 2s>BNWTU
fixDown(1); #qUGc`
} MslgQmlM
file://fixdown Q, "8Ty
private void fixDown(int k) { pr1bsrMuL
int j; f& \Bs8la
while ((j = k << 1) <= size) { $pKegK;'z
if (j < size %26amp;%26amp; queue[j] j++; xX9snSGz
if (queue[k]>queue[j]) file://不用交换 dz>Jl},`k
break; #d<|_
SortUtil.swap(queue,j,k); |H]0pbC)w
k = j; 1G67#L)USq
} #0Uz1[
} *-(o. !#1
private void fixUp(int k) { Ycx}FYTY
while (k > 1) { xtIF)M
int j = k >> 1; #_`qbIOAj
if (queue[j]>queue[k]) s? Xgo&rS_
break; `iN\@)E
SortUtil.swap(queue,j,k); Jf0i$
k = j; |:Maa6(W
} 4*9t:D|}
} s[dIWYs#
)v11j.D
} ms!|a_H7r
ywkRH
} m2YsE j7
h{H*k#>
SortUtil： -'L~Y~'.
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package org.rut.util.algorithm; H3`.Y$z
~'0ZW<X.
import org.rut.util.algorithm.support.BubbleSort; )n1[#x^I
import org.rut.util.algorithm.support.HeapSort; *9w-eK1{
import org.rut.util.algorithm.support.ImprovedMergeSort; r{84Y!k~*
import org.rut.util.algorithm.support.ImprovedQuickSort; q_ryW$/_
import org.rut.util.algorithm.support.InsertSort; $cc]Av4c2
import org.rut.util.algorithm.support.MergeSort; U 8p %MFD
import org.rut.util.algorithm.support.QuickSort; 6$f\#TR
import org.rut.util.algorithm.support.SelectionSort; 80T2EN:$
import org.rut.util.algorithm.support.ShellSort; lUA-ug! ^
Bd)Cijr
/** [}GKrI
* @author treeroot :<k (y?GB
* @since 2006-2-2 nHH FHnFf
* @version 1.0 9$U4x|n
*/ >}Bcv%zZ
public class SortUtil { Y)$%-'=b+
public final static int INSERT = 1; Q$ Dx:
public final static int BUBBLE = 2; E/wxX#]\
public final static int SELECTION = 3; ^W9O_5\g4a
public final static int SHELL = 4; %;R&cSZ
public final static int QUICK = 5; V82I%gPF
public final static int IMPROVED_QUICK = 6; >;bym)
public final static int MERGE = 7; =$L+J O
public final static int IMPROVED_MERGE = 8; cDzb}W*UM
public final static int HEAP = 9; }<@-=
1-N+qNSD`
public static void sort(int[] data) { z*q+5p@~
sort(data, IMPROVED_QUICK); C2\WvE%!
} 2/tx5Nc
private static String[] name={ osdoL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CY{!BV'
}; Q-F$Ryj^
*h=>*t?I2
private static Sort[] impl=new Sort[]{ GUqG1u z9
new InsertSort(), 4[JF.O6}
new BubbleSort(), Ycq )$7p
new SelectionSort(), pwS"BTZ
new ShellSort(), f-|zh#L
new QuickSort(), ' (XB|5
new ImprovedQuickSort(), *]h"J]
new MergeSort(), 2<p@G#(
new ImprovedMergeSort(), ]W4{|%@H"
new HeapSort() _x3=i\O,
}; ^);M}~
TXXG0 G
public static String toString(int algorithm){ u0,QsD)_X0
return name[algorithm-1]; )ZBNw{nh
} n-],!pL^
?daxb
public static void sort(int[] data, int algorithm) { TF5jTpGq
impl[algorithm-1].sort(data); o|y_j49
} H_t0$x(\
C& XPn;f
public static interface Sort { _j3rs97@|
public void sort(int[] data); #Ha"rr46p
} Z!^>!'Z
%eW7AO>
public static void swap(int[] data, int i, int j) { jb,a>9]p
int temp = data; 4b;*:C4?
data = data[j]; ]h' 38W
data[j] = temp; _u u&?<h
} 3N+B|WrM
} j[FB*L1!D