[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; _1w.B8Lyz@
} D-TNFYYy2
int i1=l; 1=9qAp;?o
int i2=mid+1; r+{!@`dYi
for(int cur=l;cur<=r;cur++){ E"9/YWv
if(i1==mid+1) B#qL$M,|
data[cur]=temp[i2++]; [M7iJcwt
else if(i2>r) |0C|$2
data[cur]=temp[i1++]; Z`-)1!
else if(temp[i1] data[cur]=temp[i1++]; ^F0k2pB
else 2- Npw%;
data[cur]=temp[i2++]; j:rs+1bc
} "W?l R4
} x*,q Rew
Hm+6QgCs
} ZXssvjWQV}
4*N@=v
改进后的归并排序: [3{:H"t
M(.uu`B
package org.rut.util.algorithm.support; )[y!m9Vn
)H[h53bIq
import org.rut.util.algorithm.SortUtil; wS F!Xx0
#K<=xP
/** uZqu xu.
* @author treeroot qHC*$v#.V?
* @since 2006-2-2 SHXa{-
* @version 1.0 0,vj,ic*WX
*/ :|3"H&FWK
public class ImprovedMergeSort implements SortUtil.Sort { C1#o<pv
t?%}hs\!
private static final int THRESHOLD = 10; ;3.T* ?|o
>+A1 V[
/* +,vJ7
* (non-Javadoc) jt'Y(u]2
* k$$S!qi#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4AJu2Hp
*/ ;*>QG6Fh
public void sort(int[] data) { ]Vf8mkDGO
int[] temp=new int[data.length]; M@!]U:5~V
mergeSort(data,temp,0,data.length-1); YWcui+4p}
} &P,4EaC9;
+hgaBJy
private void mergeSort(int[] data, int[] temp, int l, int r) { wa(Wit"-
int i, j, k; T9<H%iF
int mid = (l + r) / 2; ;i-D~Np|
if (l == r) ^huBqEs
return; ^V XXq
if ((mid - l) >= THRESHOLD) n7`.<*:
mergeSort(data, temp, l, mid); Sq?6R}q%
else xvdnEaWe$
insertSort(data, l, mid - l + 1); ;:-2~z~~
if ((r - mid) > THRESHOLD) A3 Rm0
mergeSort(data, temp, mid + 1, r); %4r!7X|O<
else .=b +O~
insertSort(data, mid + 1, r - mid); #RLch
Q8DQ .C
for (i = l; i <= mid; i++) { %WJ{IXlz
temp = data; bY"eC i{K
} %CsTB0Y7n,
for (j = 1; j <= r - mid; j++) { AT8B!m
temp[r - j + 1] = data[j + mid]; xyz\;3
} lvz:UWo
int a = temp[l]; 72s$
int b = temp[r]; %Zl_{Q]h
for (i = l, j = r, k = l; k <= r; k++) { ?4wehcZz
if (a < b) { ?Qo_ KQ%sn
data[k] = temp[i++]; =AnZ>6
a = temp; c~0VNuN
} else { eHnei F
data[k] = temp[j--]; YVZSKU
b = temp[j]; Ow($\,
} 3*2&Fw!B
} L3G)?rPFC#
} (7Ca\H3$
/k3n{?$/
/** )qe$rD;N
* @param data vU\w3
* @param l AP?{N:+
* @param i F"@'(b
*/ 3$kv%uf{
private void insertSort(int[] data, int start, int len) { x9&tlKKxf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V)?x*R*T)
} #:ED 0</
} m|Q&Lphb8
} |$|nV^y
} v0jz)z<#
b]s1Q ]V
堆排序： `X.=uG+m
U*qK*"k
package org.rut.util.algorithm.support; !Pi? !
9V4V}[%
import org.rut.util.algorithm.SortUtil; On96N|
S}xDB
/** (?&_6B.*
* @author treeroot u7y7
* @since 2006-2-2 nE"b`
* @version 1.0 .}hZ7>4-
*/ NM.f0{:cj
public class HeapSort implements SortUtil.Sort{ ^kR^ QL$
{'wU&!
/* (non-Javadoc) 1^H<+0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^)0{42!]
*/ #35S7G^@`
public void sort(int[] data) { BI]ut|Qw
MaxHeap h=new MaxHeap(); ~cg+BAfu
h.init(data); W*/s4 N
for(int i=0;i h.remove(); n`I jG
System.arraycopy(h.queue,1,data,0,data.length); nO.+&kA
} tgF(=a]o
_6ax{:/Q
private static class MaxHeap{ C5lD Hw[CX
^J5V!i$
void init(int[] data){ ~3-YxCn%
this.queue=new int[data.length+1]; oj4)7{
for(int i=0;i queue[++size]=data; ``YL] <<
fixUp(size); B43#9CK`o
} szsZFyW)+
} ,LPFb6o
zH\;pmWiN9
private int size=0; j n&9<"W
A@Yi{&D_Q]
private int[] queue; MIyLQ
v,.n/@s|X
public int get() { "y ,(9_#
return queue[1]; 7Hkf7\JY
} Xi`U`7?D(=
[@FeRIu8
public void remove() { ^CZ|ci6bX
SortUtil.swap(queue,1,size--); #y9K-}u
fixDown(1); ?KuJs9SM
} fN%5D z-e
file://fixdown *1$~CC7
private void fixDown(int k) { .LTFa.jxA
int j; hpi_0lMkI
while ((j = k << 1) <= size) { <n~g+ps
if (j < size %26amp;%26amp; queue[j] j++; !VZCM{
if (queue[k]>queue[j]) file://不用交换 ZwrYss
break; u(G;57ms
SortUtil.swap(queue,j,k); (lck6v?h
k = j; #1!BD!u
} |`D5XRVbi
} Q@.9wEAJ
private void fixUp(int k) { _.8]7f`*Gc
while (k > 1) { ^l2d?v8
int j = k >> 1; ;@-5lCvC(+
if (queue[j]>queue[k]) !+VN
break; 9DAwC:<r
SortUtil.swap(queue,j,k); FEi,^V
k = j; Ly/~N/<\
} Eq.zCD8A
} wm`"yNbD
%>:)4A
} :<7>-+pa
V^5k>`A
} OuIW|gIu0
cz~11j#
SortUtil： Ecl7=-y
2+Y`pz47W
package org.rut.util.algorithm; [Ik B/Xbw|
.;v'oR1x5
import org.rut.util.algorithm.support.BubbleSort; o>rlrqr?_
import org.rut.util.algorithm.support.HeapSort; aTL7"Myp
import org.rut.util.algorithm.support.ImprovedMergeSort; 5Fm?,^
import org.rut.util.algorithm.support.ImprovedQuickSort; <?@46d?C
import org.rut.util.algorithm.support.InsertSort; Uo)<_nG
import org.rut.util.algorithm.support.MergeSort; ~map5@Kd
import org.rut.util.algorithm.support.QuickSort; nPX'E`ut-V
import org.rut.util.algorithm.support.SelectionSort; [&kk
import org.rut.util.algorithm.support.ShellSort; EBE>&{%$^
,^[37/S
/** 0$h$7'a
* @author treeroot b020U>)v
* @since 2006-2-2 7 ,~Krzv
* @version 1.0 ,ui'^8{gK
*/ WG=r? xE
public class SortUtil { LO*a>9LI
public final static int INSERT = 1; GT}#iM
public final static int BUBBLE = 2; xfQ;5n
public final static int SELECTION = 3; `ZV'7|
public final static int SHELL = 4; U5%]nT"[]
public final static int QUICK = 5; t"Rf67
public final static int IMPROVED_QUICK = 6; 5{f/H] P
public final static int MERGE = 7; zw:b7B]
public final static int IMPROVED_MERGE = 8; zYJ`.,#C 5
public final static int HEAP = 9; a9JJuSRC
Vk=<,<BB
public static void sort(int[] data) { Vx8.FNJh
sort(data, IMPROVED_QUICK); m`0{j1K
} EGO@`<"h
private static String[] name={ tD482Sb=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U,}T ]J
}; T $]L 5
dOgM9P
private static Sort[] impl=new Sort[]{ ptL}F~
new InsertSort(), 'QS~<^-j"
new BubbleSort(), APm[)vw#f
new SelectionSort(), }j@@
new ShellSort(), \>k#]4@rp
new QuickSort(), v"TH[}C9D
new ImprovedQuickSort(), u<r('IW0
new MergeSort(), @ MoMU
new ImprovedMergeSort(), A+*(Pds
new HeapSort() GB Un" _J
}; ?Og;W9i
NGGd6V%'-
public static String toString(int algorithm){ !Bbwl-e`
return name[algorithm-1]; PEhLzZX+
} XYVeHP!
62E(=l
public static void sort(int[] data, int algorithm) { I9&<:`
impl[algorithm-1].sort(data); / UBAQ8TR
} DuZ]g#
3ZZI1_j
public static interface Sort { KywT Oq
public void sort(int[] data); bTKxv<
} g{{SY5qDj
U^S:2
public static void swap(int[] data, int i, int j) { nrhpId
int temp = data; 4tKf
data = data[j]; AMfu|%ZL
data[j] = temp; hzVO.Q*
} }/FM#Xh
} r{;4(3E2