[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; Wk0"U V
} YqJ `eLu
int i1=l; PNSV?RT*pG
int i2=mid+1; h^H~q<R[T
for(int cur=l;cur<=r;cur++){ dGNg[
if(i1==mid+1) a/k0(
data[cur]=temp[i2++]; EAdr}io
else if(i2>r) *_qW;l7
data[cur]=temp[i1++]; ||}k99y +
else if(temp[i1] data[cur]=temp[i1++]; K5h2 ~
else 75^U<Hz-3{
data[cur]=temp[i2++]; !xIK<H{*
} ']x`d
} rryC^Vma
ytWTJ>L
} nx2iEXsa
Bb~Q]V=x;
改进后的归并排序: dr54D
kn^?.^dVX
package org.rut.util.algorithm.support; "f1`6cx6
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import org.rut.util.algorithm.SortUtil; THOXs; k0
t&oNC6
/** )zKZ<;#y
* @author treeroot pZ IDGy=~
* @since 2006-2-2 BDO]-y
* @version 1.0 .8v[ss6:
*/ #77p>zhY
public class ImprovedMergeSort implements SortUtil.Sort { &>YdX$8x
%VSjMZ
private static final int THRESHOLD = 10; Y*KP1=Md
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/* Z ZMz0^V
* (non-Javadoc) *!wBn
* ]46-TuH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4D4Y.g_x
*/ pO10L`|
public void sort(int[] data) { vhEXtjL
int[] temp=new int[data.length]; 4)DI0b"
mergeSort(data,temp,0,data.length-1); J/{!_M-
} l)d(N7HME
"UVqHW1%K
private void mergeSort(int[] data, int[] temp, int l, int r) { zG|#__=T
int i, j, k; 0&W*U{0F\
int mid = (l + r) / 2; 3lw8%QD>
if (l == r) hk7kg/"
return; }[2|86,G;
if ((mid - l) >= THRESHOLD) 9[9 ZI1*s
mergeSort(data, temp, l, mid); &y~~Z [.F,
else m0a<~
insertSort(data, l, mid - l + 1); "fq8)
if ((r - mid) > THRESHOLD) 4Gsbcl{
mergeSort(data, temp, mid + 1, r); <jk.9$\$A
else +J+[fbqX
insertSort(data, mid + 1, r - mid); f-'$tMs
jW<aAd
for (i = l; i <= mid; i++) { >~vZ+YO
temp = data; ~t,-y*=
} t#eTn";
for (j = 1; j <= r - mid; j++) { 8#_"WzDw
temp[r - j + 1] = data[j + mid]; 8YLS/dN0 w
} jWX^h^n7K
int a = temp[l]; Cr;d !=
int b = temp[r]; q]}1/JZS
for (i = l, j = r, k = l; k <= r; k++) { J=OWXL!<a
if (a < b) { b~L8m4L
data[k] = temp[i++]; mKh<M)Bz
a = temp; b- FJMY
} else { ]ICBNJ
data[k] = temp[j--]; HEMq4v4
b = temp[j]; )`V__^
} G#(+p|n
} Ozo)}
} $(PWN6{\r^
[-pB}1Dxb
/** Ze:Y"49S+>
* @param data `JrvD
* @param l i(pevu
* @param i ~p'DPg4
*/ Z7@~#)3
private void insertSort(int[] data, int start, int len) { /EXubU73
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); puPYM"
} 9>1 $Jv3
} [ ]LiL;A&
} tc%0yr9
} p#T^o]+
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堆排序： h4 X>
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package org.rut.util.algorithm.support; GSh~j-C'
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import org.rut.util.algorithm.SortUtil; |!=KLJUA
G'\x9%
/** oO8opS7F
* @author treeroot W2CQk
* @since 2006-2-2 RgQ;fYS
* @version 1.0 wzka4J{
*/ a!?&8$^<
public class HeapSort implements SortUtil.Sort{ $kM8E@x2
Nsd7?|@HI
/* (non-Javadoc) 8pQ:B/3=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VSJ08Ngi
*/ wV,l }Xb-
public void sort(int[] data) { Fm3f/]>k#_
MaxHeap h=new MaxHeap(); g^qbd$}
h.init(data); YhzDi>hob
for(int i=0;i h.remove(); OlV'#D
System.arraycopy(h.queue,1,data,0,data.length); Wxxnc#;lv
} F|seBBu
ny,a5zEnF
private static class MaxHeap{ 2\:z
O [81nlhS0
void init(int[] data){ BW61WH?
this.queue=new int[data.length+1]; :<}.3Q?&
for(int i=0;i queue[++size]=data; )^ky @V
fixUp(size); @fVCGV?'
} 3V"y|q
} ~D9VjXfL)
5>e3srKu
private int size=0; VgSk\:t
>;;tX3(
private int[] queue; SuHv{u45
;AwQpq>dy
public int get() { njk1x
return queue[1]; N!`8-ap\^
} cVR3_e{&H
PUdJ>U
public void remove() { 8-wW?YTG
SortUtil.swap(queue,1,size--); ^lP_{c
fixDown(1); &d`z|Gx9
} g8_C|lVZi
file://fixdown DM-8azq $
private void fixDown(int k) { E/MNz}+
int j; .o2]ndT/J
while ((j = k << 1) <= size) { 8%$Vj
if (j < size %26amp;%26amp; queue[j] j++; H9["ZRL,Q
if (queue[k]>queue[j]) file://不用交换 C(7Y5\"P
break; w :w
SortUtil.swap(queue,j,k); M=!RJ%6f
k = j; buXPeIo^VM
} }^Unx W
} Zm:Wig ,a
private void fixUp(int k) { K$H>/*&'~
while (k > 1) { ',MiD=_
int j = k >> 1; {ZS-]|Kx
if (queue[j]>queue[k]) [Z5Lgg&
break; pX:FXzYQ
SortUtil.swap(queue,j,k); R?Dbv'lp>
k = j; PC| U]
} ; )Vro
} 4DVkycM
*aXZONym
} _l&`* 2d
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} D&{7Av
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SortUtil： qIwI]ub~
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package org.rut.util.algorithm; {(7D=\eU
^N!l$&=
import org.rut.util.algorithm.support.BubbleSort; yqF$J"=|
import org.rut.util.algorithm.support.HeapSort; G\\zk
import org.rut.util.algorithm.support.ImprovedMergeSort; e!wS"[,
import org.rut.util.algorithm.support.ImprovedQuickSort; `L(AvSR
import org.rut.util.algorithm.support.InsertSort; g8yWFqE!T
import org.rut.util.algorithm.support.MergeSort; B)F2SK<@
import org.rut.util.algorithm.support.QuickSort; $X%GzrN
import org.rut.util.algorithm.support.SelectionSort; 2&E1)^
import org.rut.util.algorithm.support.ShellSort; 1NO<K`
A#W%ud4
/** GNXQD}L?b?
* @author treeroot rl^_RI
* @since 2006-2-2 \A\a=A[
* @version 1.0 =nEl m*E
*/ (Al.hEs'
public class SortUtil { P5ii3a?R
public final static int INSERT = 1; VVdgNT|}W
public final static int BUBBLE = 2; )-824?Nl:
public final static int SELECTION = 3; ,CguY/y
public final static int SHELL = 4; rN)T xH&*p
public final static int QUICK = 5; Bv$;yR
public final static int IMPROVED_QUICK = 6; w$H=GF?"
public final static int MERGE = 7; 22L#\qVkl
public final static int IMPROVED_MERGE = 8; jxL5L[
public final static int HEAP = 9; Hw34wQX
i=%wZHc;
public static void sort(int[] data) { CTt3W>'=+
sort(data, IMPROVED_QUICK); 1Y410-.3w{
} /sENoQR
private static String[] name={ ^3QHB1I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v709#/cR
}; lhAwTOn`Q
4J2NIFZ
private static Sort[] impl=new Sort[]{ GLA,,i'i9
new InsertSort(), @B$ Y`eK\
new BubbleSort(), |jW82L+!N%
new SelectionSort(), $%VFk53I
new ShellSort(), h2+vl@X
new QuickSort(), e9hT
new ImprovedQuickSort(), E9{Gaa/{
new MergeSort(), \$s<G|<P
new ImprovedMergeSort(), @*L^Jgn
new HeapSort() )cB00*/
}; |sHIT<=m
nH*U
public static String toString(int algorithm){ xfqgK D>
return name[algorithm-1]; gOa'o<
} 08vA;6zt
=35^k-VS
public static void sort(int[] data, int algorithm) { F<X)eO]tk
impl[algorithm-1].sort(data); !l@IG C
} G@h6>O
qev1bBW
public static interface Sort { q~.\NKc
public void sort(int[] data); |)i-c`x
} ?)-*&1cv
Afo(! v
public static void swap(int[] data, int i, int j) { ~!j1</$_
int temp = data; 0)-l9V
data = data[j]; ]q7\
data[j] = temp; e{.2*>pH
} !)ey~Suh
} $zbm!._~DA