[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; tvcM< e20
} D]?yGI_
int i1=l; F*p@hl
int i2=mid+1; mWTV)z57
for(int cur=l;cur<=r;cur++){ dmPAPCm%y
if(i1==mid+1) s|D[_N!|
data[cur]=temp[i2++]; &Ivf!Bgm{Z
else if(i2>r) -+fW/Uo
data[cur]=temp[i1++]; k{J\)z
else if(temp[i1] data[cur]=temp[i1++]; pcNpr`
else >l^[73,]L
data[cur]=temp[i2++]; &0RKNpwg
} .f9&.H#
} j5!pS xOC
`%_(_%K
} M.``o1b
K$c?:?wmo
改进后的归并排序: ,:xses*7
,SH^L|I
package org.rut.util.algorithm.support; p9[gG\
n'83P%x
import org.rut.util.algorithm.SortUtil; `{H!V~42
Ntlbn&lc;D
/** i|!W;2KL5
* @author treeroot qlC4&82=Q
* @since 2006-2-2 .o)
* @version 1.0 Sz-TarTF
*/ D-Q54"^3
public class ImprovedMergeSort implements SortUtil.Sort { q.ZkQN+
G2w0r,[
private static final int THRESHOLD = 10; -u~AY#*
n!h952"
/* `<(o;*&Gd
* (non-Javadoc) 6ag0c&k
* I]Ws
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (l}nwyh5
*/ #&snl
public void sort(int[] data) { l4AXjq2
int[] temp=new int[data.length]; WO=P~F<
mergeSort(data,temp,0,data.length-1); C ett*jm_
} og`g]Z<I
ld7B{ ?]
private void mergeSort(int[] data, int[] temp, int l, int r) { R'$1,ie
int i, j, k; |?\2F
int mid = (l + r) / 2; XGAR8=tic
if (l == r) uQ3W =
return; Ygc.0VKMR
if ((mid - l) >= THRESHOLD) (r/))I9^
mergeSort(data, temp, l, mid); x,Z:12H0
else zO((FQ
insertSort(data, l, mid - l + 1); { {+:Vy
if ((r - mid) > THRESHOLD) <G#Q f|&
mergeSort(data, temp, mid + 1, r); G\|P3j
else <x1,4a~
insertSort(data, mid + 1, r - mid); #YK=e&da
Rts.jm>[
for (i = l; i <= mid; i++) { p~z\&&0U0
temp = data; B~`:?f9ny5
} ]u47]L#
for (j = 1; j <= r - mid; j++) { &/$3>MD2`
temp[r - j + 1] = data[j + mid]; .NMZHK?%
} P(B&*1X
int a = temp[l]; B3Ws)nF"
int b = temp[r]; 6 -IThC
for (i = l, j = r, k = l; k <= r; k++) { QJ,~K&?
if (a < b) { U]"6KS
data[k] = temp[i++]; t:%u4\nZ;
a = temp; gM&4Ur
} else { ?3do-tTp
data[k] = temp[j--]; s[%@3bY!7
b = temp[j]; rQ)I
} /gP"X1.
} UVD*GsBk
} yH(%*-S
e/zz.cd){
/** 4R&pb1eF
* @param data B:fulgh2ni
* @param l K}QZdN']
* @param i @gi / 1cq
*/ E+P-)bRa
private void insertSort(int[] data, int start, int len) { ^]9.$$GU\A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gFnJDR
} %D>cY!
} /\m>PcPa
} nBtKSNT#Q
} te+r.(p
gP?.io9Oi
堆排序： "(yw(/
p5#UH
package org.rut.util.algorithm.support; E2Ec`o
jBJ|%KM
import org.rut.util.algorithm.SortUtil; MZ_dI"J,
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/** w%~Mg3|
* @author treeroot -NUA
* @since 2006-2-2 wcL|{rUXba
* @version 1.0 n8o(>?Kw
*/ e84O 6K6o
public class HeapSort implements SortUtil.Sort{ y)T|1)
mBDzc(_\$'
/* (non-Javadoc) s$xm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -|GX]jx(Y
*/ m5lTf
public void sort(int[] data) { P"r7m
MaxHeap h=new MaxHeap(); q}hHoSG]=
h.init(data); ADB,gap
for(int i=0;i h.remove(); v|:TYpku3
System.arraycopy(h.queue,1,data,0,data.length); nw=:+?
} |\N))K-2D
;& zBNj
private static class MaxHeap{ ?;DzWCL~9
hzrS_v
void init(int[] data){ DS=Dg@y
this.queue=new int[data.length+1]; BoofJm
for(int i=0;i queue[++size]=data; gNSsT])
fixUp(size); R RnT.MU
} Q6d>tqWhq
} ?, cI!c`
p;)@R$*
private int size=0; VTn6@z_ x
j!K{1s[.y
private int[] queue; PF:'dv
Z>hGqFZ0{
public int get() { kI,O9z7A7
return queue[1]; TeH_DVxj
} z*`nfTw l
%]!xr6d
public void remove() { D3x W?$Z
SortUtil.swap(queue,1,size--); rXVRX#Lh
fixDown(1); -!X\xA/KN
} Ee'wsL
file://fixdown iM"L%6*I^
private void fixDown(int k) { 9KMtPBZ
int j; 6bUcrw/# p
while ((j = k << 1) <= size) { NQ,2pM<*-
if (j < size %26amp;%26amp; queue[j] j++; 9C|-|mo
if (queue[k]>queue[j]) file://不用交换 nOK1Wc%/'
break; G9h Bp
SortUtil.swap(queue,j,k); hc]5f3Z
k = j; Yw,LEXLY
} /\5u-o)
} 92Rm{n
private void fixUp(int k) { [[KIuW~ot
while (k > 1) { :YNXS;>)!
int j = k >> 1; :@J.!dokF
if (queue[j]>queue[k]) +6f[<^K#
break; z}2
SortUtil.swap(queue,j,k); CwsC)]{/o
k = j; L%I8no-Q
} p0C|ECH
} @<B$LJ|jdG
p~dj-w
} X,`e1nsR
O:+?:aI@
} cT#R B7
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SortUtil： q[%SF=~<k{
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package org.rut.util.algorithm; U9h@1:
"@rXN"4
import org.rut.util.algorithm.support.BubbleSort; }N@+bNh~
import org.rut.util.algorithm.support.HeapSort; ;b^"b{
import org.rut.util.algorithm.support.ImprovedMergeSort; :tX,`G
import org.rut.util.algorithm.support.ImprovedQuickSort; C^ Oy.s
import org.rut.util.algorithm.support.InsertSort; en29<#8TO
import org.rut.util.algorithm.support.MergeSort; ?$%2\"wX~7
import org.rut.util.algorithm.support.QuickSort; ~s>Ud<l%r
import org.rut.util.algorithm.support.SelectionSort; _+. )8
import org.rut.util.algorithm.support.ShellSort; AmBLZ<f;
6='x}Qb\H
/** #)( D_*
* @author treeroot pxHJX2
* @since 2006-2-2 iTJE:[W"y
* @version 1.0 vSGvv43G
*/ S0tPnwco[~
public class SortUtil { B q7Qbj
public final static int INSERT = 1; SHN'$f0Mb
public final static int BUBBLE = 2; M[?0 ^ FBx
public final static int SELECTION = 3; VHx:3G
public final static int SHELL = 4; zE]h]$oi
public final static int QUICK = 5; =Y-mc#{8
public final static int IMPROVED_QUICK = 6; }N W01nee
public final static int MERGE = 7; LRv[,]b
public final static int IMPROVED_MERGE = 8; P#qQde/y
public final static int HEAP = 9; '~[JV>5
%Su,
public static void sort(int[] data) { >npFg@A
sort(data, IMPROVED_QUICK); cGS7s 8U
} "i;"
private static String[] name={ a fUOIM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zl!Y(o!@
}; AR7]~+X
*hkNJ
private static Sort[] impl=new Sort[]{ zl@hg<n
new InsertSort(), "[\),7&03
new BubbleSort(), X5c)T}pyv
new SelectionSort(), 3zo:)N\K
new ShellSort(), !Q5NV4gd+
new QuickSort(), n^%",*8gD*
new ImprovedQuickSort(), _:VIlg U
new MergeSort(), }vt>}%%
new ImprovedMergeSort(), 7kh(WtUz
new HeapSort() 'klYGp
}; GA2kg7
]xN)>A2
public static String toString(int algorithm){ GaLQ/V2R
return name[algorithm-1]; I'%ASZ
} 9M1UkS$`@
Y%@a~|
public static void sort(int[] data, int algorithm) { Ep1p>s^
impl[algorithm-1].sort(data); Oq*=oz^~1
} qBqh>Wo
gR@,"6b3
public static interface Sort { bSS=<G9
public void sort(int[] data); O@sJ#i>
} a_o99lP
Ys@G0}\3G
public static void swap(int[] data, int i, int j) { K1m'20U
int temp = data; _BBs{47{E
data = data[j]; $Ce;}sM
data[j] = temp; eTZ2f
} {Zrf>ST
} Gw?$.@L'I6