[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; ozxYH],
} Z( #Ln
int i1=l; |mj# 0
int i2=mid+1; 6wpU6NU
for(int cur=l;cur<=r;cur++){ b}%g}L D
if(i1==mid+1) 0 [i+
data[cur]=temp[i2++]; B~_Spp
else if(i2>r) >Zdi5') 5
data[cur]=temp[i1++]; dYyW]nZ&
else if(temp[i1] data[cur]=temp[i1++]; ~Oh=
else g+9v$[!
data[cur]=temp[i2++]; l.7d$8'\
} IIaxgfhZ
} 5w-JPjH
zKJ.Tj W
} _[1^s$
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改进后的归并排序: A7(M,4`6
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package org.rut.util.algorithm.support; hb! ln7
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import org.rut.util.algorithm.SortUtil; S$K}v,8.sr
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/** W^(Iw%ek
* @author treeroot o PaZ
* @since 2006-2-2 wA r~<
* @version 1.0 ! o^Ic`FhS
*/ 0l1.O2-
public class ImprovedMergeSort implements SortUtil.Sort { u0BMyH
-,/3"}<^78
private static final int THRESHOLD = 10; 9>{t}Id
&Y=.D:z<
/* 3`rIV*&_{
* (non-Javadoc) eKJ:?Lxv;
* >i`8R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !a4cjc(
*/ !u%9;>T7
public void sort(int[] data) { 3"vRK5Bf
int[] temp=new int[data.length]; Wo2v5-
mergeSort(data,temp,0,data.length-1); K>LpN')d
} 9ET/I$n
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private void mergeSort(int[] data, int[] temp, int l, int r) { |1i]L@&
int i, j, k; :Q=z=`*2w
int mid = (l + r) / 2; UnjNR[=
if (l == r) C1D ! V:
return; {WKOJG+.
if ((mid - l) >= THRESHOLD) I<xy?{s
mergeSort(data, temp, l, mid); qM*S*,s
else CfY7<o1>
insertSort(data, l, mid - l + 1); O8$~*NFJf
if ((r - mid) > THRESHOLD) Ft$^x-d
mergeSort(data, temp, mid + 1, r); Nor`c+,4
else NZ)b:~a
insertSort(data, mid + 1, r - mid); &PSTwZd
yP%o0n/"x
for (i = l; i <= mid; i++) { 55,=[
temp = data; 2x6<8J8v*
} Lxz
for (j = 1; j <= r - mid; j++) { :4iU^6
temp[r - j + 1] = data[j + mid]; 7y;u} 1
} yIa[yJq
int a = temp[l]; nIR*_<ow
int b = temp[r]; +h|K[=l\
for (i = l, j = r, k = l; k <= r; k++) { HlF}
if (a < b) { UE{,.s
data[k] = temp[i++]; U81;7L8
a = temp; <g*.p@o
} else { s1Okoxh/!V
data[k] = temp[j--]; m'SmN{(t
b = temp[j]; %Dra7B%
} *i%.{ YH
} N tO?
} )X~#n
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/** QQT G9s
* @param data fPOEVmj<
* @param l ||`qIElAW,
* @param i VOg/VGJ
*/ | yS5[?.`
private void insertSort(int[] data, int start, int len) { }U(\~ =D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ou? r {$(b
} 2q/nAQ+
} XN4oL[pO
} Et)920
} U|9U(il
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堆排序： z;ULQ
U%h7h`=F?
package org.rut.util.algorithm.support; 70duk:Ri0
qPqy4V.;
import org.rut.util.algorithm.SortUtil; aN:HG)$@
yB=C5-\F
/** v;Swo("
* @author treeroot sE-x"c
* @since 2006-2-2 xcw%RUC-
* @version 1.0 9^(HXH_f
*/ Y:rJK|m
public class HeapSort implements SortUtil.Sort{ NoJUx['6
lD9%xCo9(
/* (non-Javadoc) g)X7FxS,z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HgYc@P*b
*/ @l)\?IEF@f
public void sort(int[] data) { (rAiDRQ[
MaxHeap h=new MaxHeap(); )\D2\1e(c
h.init(data); W^003*m~~K
for(int i=0;i h.remove(); Q^[e/U,
System.arraycopy(h.queue,1,data,0,data.length); FPvuzBJ
} vlAO z
4}+xeGA$
private static class MaxHeap{ zjea4>!A2
E!dz/.
void init(int[] data){ /SbSID_a
this.queue=new int[data.length+1]; {ms,q_Zr
for(int i=0;i queue[++size]=data; @k_Jl>X
fixUp(size); V+peO
} p(~Y" H
} yI3Q|731)
JL?Cnk$!
private int size=0; 45?*:)l:
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private int[] queue; R:]/{b4Uq
gW'P`Oxw
public int get() { fS5GICx8R
return queue[1]; hyJ ded&D
} 79TPg
+.S#=
public void remove() { J 5Wz4`'
SortUtil.swap(queue,1,size--); j?Cr31
fixDown(1); mfu*o0
} g8LT7
file://fixdown di"C]" ;
private void fixDown(int k) { Tld1P69(
int j; P{"WlJ
while ((j = k << 1) <= size) { 0[V&8\S~'T
if (j < size %26amp;%26amp; queue[j] j++; (m<R0
if (queue[k]>queue[j]) file://不用交换 Y0@'za^y
break; "kcpA#uD|
SortUtil.swap(queue,j,k); #.<*; rB
k = j; o G(0i
} w9G_>+?E
} f0/jwfL
private void fixUp(int k) { l.XknF
while (k > 1) { 17WNJ
int j = k >> 1; 7vii9Am7
if (queue[j]>queue[k]) h9w@oRp`~
break; 44'=;/
SortUtil.swap(queue,j,k); n33JTqX
k = j; 1y},9ym
} ->#y(}
} c_@XQ&DC`
Tg3:VD
} <^CYxy
R#"U/8b>z
} %T`4!:vy
q:TZ=bs^
SortUtil： -@YVe:$%b
V<7R_}^_7
package org.rut.util.algorithm; zj~8>QnKk
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import org.rut.util.algorithm.support.BubbleSort; Gojl0?
import org.rut.util.algorithm.support.HeapSort; x?%rx}h
import org.rut.util.algorithm.support.ImprovedMergeSort; rFKo E%
import org.rut.util.algorithm.support.ImprovedQuickSort; AeNyZ[40T
import org.rut.util.algorithm.support.InsertSort; @o}1n?w
import org.rut.util.algorithm.support.MergeSort; -s9Y(>
import org.rut.util.algorithm.support.QuickSort; 1;cv-W
import org.rut.util.algorithm.support.SelectionSort; skk-.9
import org.rut.util.algorithm.support.ShellSort; Z-N-9E
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/** s5c! ^,L8
* @author treeroot d%}crM-KTL
* @since 2006-2-2 r4;5b s6wm
* @version 1.0 ^m6k@VM
*/ Gl?P.BCW.&
public class SortUtil { !Z#_X@NFc
public final static int INSERT = 1; v+xgxQGYH
public final static int BUBBLE = 2; K!IF?iell
public final static int SELECTION = 3; hKk\Y{wv'
public final static int SHELL = 4; *23m-
public final static int QUICK = 5; 1_Dn?G^H
public final static int IMPROVED_QUICK = 6; 7sQ]w
public final static int MERGE = 7; /Nj:!! AN
public final static int IMPROVED_MERGE = 8; Q3B'-BZe
public final static int HEAP = 9; LP5eFl`|T
S1}1"y/
public static void sort(int[] data) { qPFG+~\c
sort(data, IMPROVED_QUICK); *k3 d^9o#
} B(4:_j\2
private static String[] name={ 5;3c<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "/4s8.dw+u
}; 3e!3.$4M
Nw9-pQ
private static Sort[] impl=new Sort[]{ ,omp F$%
new InsertSort(), AJ;u&&c4C\
new BubbleSort(), ka?IX9t\
new SelectionSort(), 8w{#R{w
new ShellSort(), xm%[}Dt]
new QuickSort(), TEaD-mY3
new ImprovedQuickSort(), -4*'WzWr
new MergeSort(), q|47;bK'
new ImprovedMergeSort(), z;fd#N:
new HeapSort() l}2%?d
}; %\(y8QV
-V;0_Nx7p
public static String toString(int algorithm){ p|bc=`TD
return name[algorithm-1]; ,<uiitOo
} l5\B2 +}7
:$SRG^7md
public static void sort(int[] data, int algorithm) { ; McIxvj
impl[algorithm-1].sort(data); r85Xa'hh
} ,?0-=o
BNL8hK`D
public static interface Sort { L}e"nzTE6I
public void sort(int[] data); <B]i80.
} Dyouk+08x
1jUhG2y
public static void swap(int[] data, int i, int j) { rZ8Y=) e
int temp = data; (n":]8}
data = data[j]; ~uhyROO,G"
data[j] = temp; wzHjEW
} %468s7Q[Mi
} #lBpln9