[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; " 9 h]P^
} vhZpYW8
int i1=l; d/- f]
int i2=mid+1; <<v,9*h
for(int cur=l;cur<=r;cur++){ vgHMVzxj
if(i1==mid+1) z)q9O_g9
data[cur]=temp[i2++]; r_I7Gd
else if(i2>r) J`uV $l:
data[cur]=temp[i1++]; (2QFwBW]
else if(temp[i1] data[cur]=temp[i1++]; //>f#8Ho
else 'wLQ9o%=p|
data[cur]=temp[i2++]; <;+&`R
} N4}/n
} Z|uUE
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} +Ld4e]
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改进后的归并排序: [st4FaQ36
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package org.rut.util.algorithm.support; }!(cm;XA"
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import org.rut.util.algorithm.SortUtil; >Rjk d>K3
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/** \NS\>Q+d
* @author treeroot S*IF/ fu
* @since 2006-2-2 ]gHw;ry
* @version 1.0 %-i2MK'A
*/ m/JpYv~
public class ImprovedMergeSort implements SortUtil.Sort { EP'2'51
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private static final int THRESHOLD = 10; %[-D&flKC
Sh*LD QL<?
/* =5oE|F%
* (non-Javadoc) ,S2D/Y^>
* H{E223
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d5\w'@Di
*/ 7$a,pNDw
public void sort(int[] data) { 65\'(99yU
int[] temp=new int[data.length]; *rK}Ai
mergeSort(data,temp,0,data.length-1); w8kp6_i'
} VW I{ wC
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private void mergeSort(int[] data, int[] temp, int l, int r) { ,*Tf9=z
int i, j, k; x;99[C!$
int mid = (l + r) / 2; +S5"4<
if (l == r) u8v;O}#
return; 4W*52*'F,
if ((mid - l) >= THRESHOLD) 8{8J(~
mergeSort(data, temp, l, mid); ,mhO\P96ik
else OSK3X Qc
insertSort(data, l, mid - l + 1); ib0M$Y1tIS
if ((r - mid) > THRESHOLD) -{>JF
mergeSort(data, temp, mid + 1, r); u=5&e)v3
else <6)Ogv",
insertSort(data, mid + 1, r - mid); OySIp[{tJ
/G9wW+1
for (i = l; i <= mid; i++) { 5yI_uQR
temp = data; 4)!aYvaER
} :,Q\!s!
for (j = 1; j <= r - mid; j++) { ly7\H3
temp[r - j + 1] = data[j + mid]; "H" 4(3
} ;x$,x-
int a = temp[l]; Jv %,v?
int b = temp[r]; \ty{KAc&
for (i = l, j = r, k = l; k <= r; k++) { b<P9@h~:
if (a < b) { Q.>@w<[!L
data[k] = temp[i++]; <[@AMdS
a = temp; )/1AF^ E
} else { >u ,Ac:
data[k] = temp[j--]; xqs{d&W
b = temp[j]; ztKmB
} B+#!%J_
} WolkW:(Cg
} :Gsh
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/** `|Pfa
* @param data 5f(yF
* @param l n#Q;bSw
* @param i O; 7`*}m
*/ ?{NP3
private void insertSort(int[] data, int start, int len) { "-88bF~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I} m\(TS-"
} D>|m8-@]
} =&;orP
} ]B/Gz
} s!X@ l
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堆排序： NGcd
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package org.rut.util.algorithm.support; P$ZIKkf
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import org.rut.util.algorithm.SortUtil; wmAZ {
zePVB-@u
/** VNBf2Va
* @author treeroot h+<vWo}H
* @since 2006-2-2 m-Q!V+XQp
* @version 1.0 it.Lh'N;T
*/ UmUw>+A
public class HeapSort implements SortUtil.Sort{ SR)G!9z_/
p2 V8{k
/* (non-Javadoc) 8yij=T*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o@*eC L=
*/ @/FE!6 |O
public void sort(int[] data) { y.(Yh1
MaxHeap h=new MaxHeap(); 4r&DW'
h.init(data); \{``r
for(int i=0;i h.remove(); G_vWwH4XtL
System.arraycopy(h.queue,1,data,0,data.length); Y"6 '
} %Hx8%G!
VPW@y
private static class MaxHeap{ 7DZxrVw
.<7M4Z
void init(int[] data){ @SeInew;`l
this.queue=new int[data.length+1]; oS6dcJHf
for(int i=0;i queue[++size]=data; UKX9C"-5v
fixUp(size); nX~Qt%
} ntR@[)K
} kZ7\zbN>
$;7,T~{
private int size=0; U4)x"s[CP
+yYxHIOZ(
private int[] queue; OH.^m6Z
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public int get() { B=14 hY@`
return queue[1]; t6u>_She
} :5|'C
R9XISsM^
public void remove() { eajctkzj
SortUtil.swap(queue,1,size--); r9MS,KG8
fixDown(1); ykK21P,v
} H4RqOI
file://fixdown &U*MLf83`
private void fixDown(int k) { &!i'Q;q
int j; [bM$n m
while ((j = k << 1) <= size) { ,w-=8>5lrj
if (j < size %26amp;%26amp; queue[j] j++; ^u2unZ9BK!
if (queue[k]>queue[j]) file://不用交换 pRR1k?
break; m8M2ka
SortUtil.swap(queue,j,k); =VIU
k = j; stGk*\>U'
} ?R-4uG[(
} V /i~IG`h/
private void fixUp(int k) { T:FaD V{
while (k > 1) { )/4eT\=
int j = k >> 1; a(.q=W
if (queue[j]>queue[k]) P"*#mH[W|
break; cft/;Au{
SortUtil.swap(queue,j,k); 'O>p@BEK
k = j; 55O_b)$
} <MK4#I1I
} +vf~s^
;OC~,?O5
} oZ]^zzoEcg
v7-z<'?s~
} {7d(B1[1
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SortUtil： BjX*Gm6l
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package org.rut.util.algorithm; %u=b_4K"j
kPRG^Ox8e
import org.rut.util.algorithm.support.BubbleSort; 6&oaxAp<s
import org.rut.util.algorithm.support.HeapSort; s!73To}>
import org.rut.util.algorithm.support.ImprovedMergeSort; :O?+Ywn
import org.rut.util.algorithm.support.ImprovedQuickSort; UP<B>Y1a
import org.rut.util.algorithm.support.InsertSort; \7V[G6'{
import org.rut.util.algorithm.support.MergeSort; Sb QM!Q
import org.rut.util.algorithm.support.QuickSort; RnV#[bM{
import org.rut.util.algorithm.support.SelectionSort; MZIZ"b
import org.rut.util.algorithm.support.ShellSort; #(pY~\
K92nh/}y
/** 6(pa2
* @author treeroot 0*J},#ba$
* @since 2006-2-2 1&Z#$iD
* @version 1.0 ] 6Y6q])Z
*/ x)+ q$FB
public class SortUtil { " fXs!
public final static int INSERT = 1; Pk?M~{S
public final static int BUBBLE = 2; 4H9mKR
public final static int SELECTION = 3; i<\WRzVT
public final static int SHELL = 4; #'y4UN
public final static int QUICK = 5; DpbprT7_
public final static int IMPROVED_QUICK = 6; _ASyGmO{
public final static int MERGE = 7; evSr?ys
public final static int IMPROVED_MERGE = 8; } "QL"%
public final static int HEAP = 9; Wf!u?nH.5
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public static void sort(int[] data) { 8*x/NaH /\
sort(data, IMPROVED_QUICK); '_q&~M{
} t~v_k\`{
private static String[] name={ E$"`|Df
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sdzl[K/}
}; 0{^ 0>H0
qtR/K=^i
private static Sort[] impl=new Sort[]{ )U|0vr8:
new InsertSort(), +b sc3
new BubbleSort(), pQ,|l$^m
new SelectionSort(), W?H-Ng3E
new ShellSort(), f7_V ]
new QuickSort(), |S6L[Uo
new ImprovedQuickSort(), Au10]b
new MergeSort(), <D`VFSEJ
new ImprovedMergeSort(), mYx6JU*`
new HeapSort() b[U;P=;=
}; B;64(Vsa8
0<[g7BbR
public static String toString(int algorithm){ vJ?j#Ch
return name[algorithm-1]; r91b]m3xL
} Bo+Yu(|cL
Je*hyi7
public static void sort(int[] data, int algorithm) { }PUY~ u
impl[algorithm-1].sort(data); a7U`/*
} 0/5{v6_rG
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public static interface Sort { GIM'H;XG
public void sort(int[] data); IkP; i_|
} GMKY1{
dbG902dR
public static void swap(int[] data, int i, int j) { RW`+F|UbE
int temp = data; T9NTL\;
data = data[j]; bQgtZHO
data[j] = temp; 0`QF:
} GHRr+
} ruU &.mZ