[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; /bn$@Cy@
} ^G 'n z
int i1=l; *8+HQ[[#
int i2=mid+1; Q{5.;{/eC
for(int cur=l;cur<=r;cur++){ RUq[HxF) 6
if(i1==mid+1) H )>3c1
data[cur]=temp[i2++]; lWH#/5`h
else if(i2>r) Bt#'6::
data[cur]=temp[i1++]; ]t~'wL#Z
else if(temp[i1] data[cur]=temp[i1++]; Mnk-"d
else ,c0t#KgQ.
data[cur]=temp[i2++]; E3(o}O
} D+jE{v'
} +*Fe
D>^g2!b:
} EM@EB<pRX
H!6+x*P0
改进后的归并排序: ll[&O4.F
cq5^7.
package org.rut.util.algorithm.support; yJ`{\7Uqg
$=ESY>MO
import org.rut.util.algorithm.SortUtil; y\4/M6
7SN61)[m
/** acar-11_o/
* @author treeroot EiaP1o
* @since 2006-2-2 Q/]o'_[vW
* @version 1.0 GY %$7
*/ @4Zkkjc4b
public class ImprovedMergeSort implements SortUtil.Sort { H|7XfM
*_d N9
private static final int THRESHOLD = 10; *wsZ aQ
4<vi@,s
/* I(WIT=Wi<
* (non-Javadoc) j6};K ~N`
* $RB p!7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @nMVs6
*/ SSbx[<E3
public void sort(int[] data) { ^7*7^<
int[] temp=new int[data.length]; v,8Q9<=O
mergeSort(data,temp,0,data.length-1); AC 2kG
} I}f7|hYX
,t;US.s([.
private void mergeSort(int[] data, int[] temp, int l, int r) { DajN1}]
int i, j, k; yTn<5T[H
int mid = (l + r) / 2; )m[<lJbw
if (l == r) QoZZXCU
return; s&'FaqE
if ((mid - l) >= THRESHOLD) |lZJt
mergeSort(data, temp, l, mid); Fa\jVFIQ
else ?Z4%u8Krvz
insertSort(data, l, mid - l + 1); Vy|4k2
if ((r - mid) > THRESHOLD) Ud2Tn*QmI
mergeSort(data, temp, mid + 1, r); :bi(mX7t
else WRA(k
insertSort(data, mid + 1, r - mid); /u_9uJ"-K(
l]#=I7 6
for (i = l; i <= mid; i++) { 7lA_*t@y
temp = data; #,#:{&H
} fBh/$
for (j = 1; j <= r - mid; j++) { Hq,@j{($
temp[r - j + 1] = data[j + mid]; #D%6b
} Qca3{|r`
int a = temp[l]; wf1p/bpf
int b = temp[r]; fLd2{jI,
for (i = l, j = r, k = l; k <= r; k++) { &cJ?mSI
if (a < b) { 7&OJ8B/
data[k] = temp[i++]; {IvA 5^
a = temp; |Ldvfd
} else { qX; F+~
data[k] = temp[j--]; EaHJl
b = temp[j]; hQ!59
} j_~mP>el)
} i7v=o#
} ggitUQ+t;G
6O.kKhk
/** 2"6qg>]-t
* @param data J .TK<!
* @param l 1E'PSq
* @param i #$W0%7
*/ 4zt:3bWU
private void insertSort(int[] data, int start, int len) { ?8?vBkz~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GA/afc,V
} a j$& 9][
} \=[j9'N>
} 3 =c#LUA`
} ;hV|W{=w
:g' 'GqGZ
堆排序： tg==Qgz
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package org.rut.util.algorithm.support; r}^1dO
L6i|5 P
import org.rut.util.algorithm.SortUtil; /':64#'
0sH~yvM5
/** u0,QsD)_X0
* @author treeroot @9n|5.i
* @since 2006-2-2 4b;*:C4?
* @version 1.0 iM;Btv[|
*/ V_D wHq2
public class HeapSort implements SortUtil.Sort{ ]B3+&g
TQNdBq5I6
/* (non-Javadoc) 89GW!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S;gy:n!t
*/ QKx(S=4jQ
public void sort(int[] data) { o#1Ta7Ro
MaxHeap h=new MaxHeap(); &"gX 7cK8
h.init(data); U<=d@knH
for(int i=0;i h.remove(); w+)wrJTtm
System.arraycopy(h.queue,1,data,0,data.length); zTfjuI|R
} 0zT-]0
Q&w_kz.
private static class MaxHeap{ 3)LS#=
a9.255
void init(int[] data){ XOQ0(e6
this.queue=new int[data.length+1]; ;<''oY
for(int i=0;i queue[++size]=data; ';8 ,RTe
fixUp(size); 5S!j$_(
} :p@jslD
} #>\SK
RU'a8j+W
private int size=0; S{8-XiL,
<ta{)}IN^
private int[] queue; +v5f-CBu
skan1wQ
public int get() { O-)[!8r
return queue[1]; x|Pz24yP9
} ub9[!}r't
4q7H
public void remove() { 4|I;z
SortUtil.swap(queue,1,size--); Ja4M@z
fixDown(1); &v1E)/q{Z
} }`H{;A h
file://fixdown NS`hXf
private void fixDown(int k) { Bw!J!cCj
int j; z;e@m2.IM
while ((j = k << 1) <= size) { :@P6ibcX
if (j < size %26amp;%26amp; queue[j] j++; xoj,>[7 D
if (queue[k]>queue[j]) file://不用交换 pO5j-d*
break; S^|`*%pq
SortUtil.swap(queue,j,k); qzA_ ~=g
k = j; 7t#Q8u?
} I+.U.e^gx
} LEtGrA/%@b
private void fixUp(int k) { ~,KrL(jC
while (k > 1) { %3TioM[B
int j = k >> 1; tWzBQx
if (queue[j]>queue[k]) $uFvZ?w&
break; cr]b #z
SortUtil.swap(queue,j,k); l/B+k
k = j; i<>%y*+@
} L>E;cDB
} ||TZ[l
):Z#!O<
} oMLs22Do?
p^q/u
} +cYDz#3%
V4}jv7>A
SortUtil： 2ib,33 Z
&s}sA+w
package org.rut.util.algorithm; WHOy\j},V
i%<NKE;v7m
import org.rut.util.algorithm.support.BubbleSort; 0QPY+6
import org.rut.util.algorithm.support.HeapSort; `+vQ5l$;L
import org.rut.util.algorithm.support.ImprovedMergeSort; DCLu^:|C"
import org.rut.util.algorithm.support.ImprovedQuickSort; 2vG X\W%3
import org.rut.util.algorithm.support.InsertSort; fibudkg'>
import org.rut.util.algorithm.support.MergeSort; ^q/$a2<4
import org.rut.util.algorithm.support.QuickSort; Bfo#N31F}
import org.rut.util.algorithm.support.SelectionSort; Whp`\E<<
import org.rut.util.algorithm.support.ShellSort; jck(cc=R
{g`!2"
/** +]-'{%-zK
* @author treeroot ik)u/r DW
* @since 2006-2-2 [N~-9
* @version 1.0 YqWNp
*/ 09P2<oFLn
public class SortUtil { u9,dSR
public final static int INSERT = 1; 1'("; 0I
public final static int BUBBLE = 2; .{?;#Cdn
public final static int SELECTION = 3; yX{7<\x
public final static int SHELL = 4; <o3I<ci6
public final static int QUICK = 5; FJ!`[.t1AU
public final static int IMPROVED_QUICK = 6; M;3q.0MU
public final static int MERGE = 7; pp1Kor
public final static int IMPROVED_MERGE = 8; sUmpf4/
public final static int HEAP = 9; ,?qJAV~>
]}l.*v\uK
public static void sort(int[] data) { j1->w8
sort(data, IMPROVED_QUICK); W+=j@JY}q9
} hS &H*
private static String[] name={ {jR3D!hK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D$H&^,?N
}; ZBx,'ph}4
F 2zUz[
private static Sort[] impl=new Sort[]{ Y?0x/2<
new InsertSort(), JBOU$A~
new BubbleSort(), Lk$Mfm5"M
new SelectionSort(), KQ6][2-
new ShellSort(), et/l7+/'
new QuickSort(), A['(@Bz#7~
new ImprovedQuickSort(), ThW9=kzQW
new MergeSort(), mAW(j@5sp
new ImprovedMergeSort(), lf KV%
new HeapSort() XVfUr\=,T
}; 9 ;uw3vI%
BdU .;_K
public static String toString(int algorithm){ ?G~rYETvw
return name[algorithm-1]; bf1$:09
} 0LzS #J+
tBZ?UAe;
public static void sort(int[] data, int algorithm) { lFIaC}
impl[algorithm-1].sort(data); =HIKn6C<
} K%/\XnCY
gN(kRhp
public static interface Sort { F g):>];<9
public void sort(int[] data); N.]~%)K:{
} Yc~lYz+b
z(O*DwY#
public static void swap(int[] data, int i, int j) { *0L3#. i
int temp = data; `}uM91;
data = data[j]; fU%Ys9:wU
data[j] = temp; };"_Ku4#-
} QZ7W:%r(4
} Xa;wx3]t