[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; %6la@i
} `SA1V),~
int i1=l; p_i',5H(
int i2=mid+1; E.,
for(int cur=l;cur<=r;cur++){ +k V$ @qH
if(i1==mid+1) b!qlucAeE
data[cur]=temp[i2++]; 7NkMr8[}F
else if(i2>r) ,0eXg
data[cur]=temp[i1++]; %@8#+#@J0
else if(temp[i1] data[cur]=temp[i1++]; Y?- "HK:
else QT=i>X
data[cur]=temp[i2++]; 0J6* U[
} IP^1ca#<
} yQ!keGj
]GDjR'[z
} c`/kx
%'/^[j#
改进后的归并排序: MkWbPm)
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package org.rut.util.algorithm.support; o1k+dJUd
,ZVhL* "
import org.rut.util.algorithm.SortUtil; `)>}b 3
!DD4Bqez
/** hW`o-'
* @author treeroot TAq[g|N-;
* @since 2006-2-2 g>g*1oS
* @version 1.0 )2 b-3lz
*/ So= BcX-
public class ImprovedMergeSort implements SortUtil.Sort { $&Z<4:Flc
j8%Y[:~D
private static final int THRESHOLD = 10; nUK;M[
gYloY=.Z$'
/* gX|\O']6
* (non-Javadoc) /]of@
* ^a$L9p(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8tO.o\)h
*/ $-.*8*9
public void sort(int[] data) { TPLv]$n
int[] temp=new int[data.length]; O)"Z%B
mergeSort(data,temp,0,data.length-1); 39d$B'"<1
} 6n;? :./
^V7)V)Z;0
private void mergeSort(int[] data, int[] temp, int l, int r) { `XM0Mm%
int i, j, k; cYBjsN(!A|
int mid = (l + r) / 2; 6!8uZ>u%Vg
if (l == r) !r9rTS]
return; ?X Rl\V
if ((mid - l) >= THRESHOLD) !}sF#
mergeSort(data, temp, l, mid); R+2~%|{d
else oi8M6l
insertSort(data, l, mid - l + 1); ge1U1o
if ((r - mid) > THRESHOLD) (hh^?
mergeSort(data, temp, mid + 1, r); AmQsay#I_
else P<;Puww/
insertSort(data, mid + 1, r - mid); EKS?3z%!
-J0OtrZ
for (i = l; i <= mid; i++) { B5+$VQ
temp = data; 9i D&y)$"
} v^;vH$B
for (j = 1; j <= r - mid; j++) { ..w$p-1
temp[r - j + 1] = data[j + mid]; " t?44[
} Hz=s)6$ey
int a = temp[l]; *?VB/yO=0
int b = temp[r]; }h* j{b,
for (i = l, j = r, k = l; k <= r; k++) { QU(Lv(/O
if (a < b) { b`ksTO`}x
data[k] = temp[i++]; HBs 6:[q
a = temp; `R!2N4|;
} else { FEX67A8/;
data[k] = temp[j--]; ;9q$eK%d
b = temp[j]; /O`R9+;
} MO|Pv j~[
} ,@I\'os
} GIfs]zVr`
KFy|,@NI
/** PZ#aq~>w
* @param data >U?#'e{qW
* @param l na 0Zb
* @param i )6eFYt%c
*/ K92M9=>
private void insertSort(int[] data, int start, int len) { O&}R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kWs:7jiiu
} g|h;*
} Z_7TD)
} $"k1^&&E
} %NfH`%`
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堆排序： +UX} "m~W
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package org.rut.util.algorithm.support; 54/ZGaonz
j^eMi
import org.rut.util.algorithm.SortUtil; kBY#=e).
t;:Yf
/** $Rn9*OKr
* @author treeroot vE)d0l"
* @since 2006-2-2 t{`-G*^
* @version 1.0 }=.C~f]A
*/ ca,c+5
public class HeapSort implements SortUtil.Sort{ ;yCtk ~T%
LX #.
/* (non-Javadoc) ABL5T-*]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7M_GGjP
*/ \jS^+Xf?^
public void sort(int[] data) { f#hmMa
MaxHeap h=new MaxHeap(); V343IT\
h.init(data); 85Kf>z::c
for(int i=0;i h.remove(); XhN?E-WywQ
System.arraycopy(h.queue,1,data,0,data.length); {7q8@`Oa
} r5+MjR
%o`Cp64`Q
private static class MaxHeap{ #qJ6iA6{
6Q&i=!fQ
void init(int[] data){ &4)PW\ioY
this.queue=new int[data.length+1]; 0UGAc]!/RZ
for(int i=0;i queue[++size]=data; 238z'I+$G/
fixUp(size); VTi;y{
} m`b:#z
} ie7TO{W
/b6j<]H
private int size=0; PWfd<Yf!
BZjL\{IW
private int[] queue; W9bpKmc
6)FM83zk)K
public int get() { w;J#+ik
return queue[1]; yA`,ns&n
} :K(+ KN(
RER93:(
public void remove() { %WYveY
SortUtil.swap(queue,1,size--); A-eCc#I
fixDown(1); |>-0q~
} zOJzQZ~
file://fixdown W#wC
private void fixDown(int k) { @v.?z2h
int j; Bu{%mm(
while ((j = k << 1) <= size) { RhE|0N=
if (j < size %26amp;%26amp; queue[j] j++; v{8r46Y~Z)
if (queue[k]>queue[j]) file://不用交换 /)rv Ndn
break; #jg3Ku;Y
SortUtil.swap(queue,j,k); -cUw}
k = j; t1G2A`
} jtqU`|FSQ
} 1J&hm[3[K
private void fixUp(int k) { ~c\2'
while (k > 1) { nQn=zbZ3
int j = k >> 1; 9A}y^=!`
if (queue[j]>queue[k]) Xj:\B] v]
break; tcI Z 2H%
SortUtil.swap(queue,j,k); ("=24R=a
k = j; Cio(Ptt:
} t,kai6UM
} *O-m:M!eA
yzXS{#\
} fOk(ivYy
|1T[P)Q
} `|:` yl
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SortUtil： ={{q_G\WD
4=|oOIhgb
package org.rut.util.algorithm; yWi?2
$tK/3
import org.rut.util.algorithm.support.BubbleSort; \x"BgLSE
import org.rut.util.algorithm.support.HeapSort; V<d`.9*}
import org.rut.util.algorithm.support.ImprovedMergeSort; NF7+Gp6?q
import org.rut.util.algorithm.support.ImprovedQuickSort; $@[Mo
import org.rut.util.algorithm.support.InsertSort; R5<:3tk=X
import org.rut.util.algorithm.support.MergeSort; @X_)%Y-^O
import org.rut.util.algorithm.support.QuickSort; 1\5po^Oioy
import org.rut.util.algorithm.support.SelectionSort; B5]nP .R
import org.rut.util.algorithm.support.ShellSort; E FBvi
"h&[6-0'
/** X\BdN Hr
* @author treeroot % "ZC9uq?
* @since 2006-2-2 zZ8:>2Ps(
* @version 1.0 X u>]$+u#
*/ iF"kR]ZL
public class SortUtil { FXid=&T@0D
public final static int INSERT = 1; mEV@~){
public final static int BUBBLE = 2; >}86#^F
public final static int SELECTION = 3; j 2e|
public final static int SHELL = 4; P>7PO~E.
public final static int QUICK = 5; U^OR\=G^
public final static int IMPROVED_QUICK = 6; )N&95\u
public final static int MERGE = 7; ; VQ:\fG
public final static int IMPROVED_MERGE = 8; s6I/%R3
public final static int HEAP = 9; ) =|8%IrB
` )~CT
public static void sort(int[] data) { N2Cf(
sort(data, IMPROVED_QUICK); !Eb!y`jK
} ul\FZT 4
private static String[] name={ $u,`bX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *,wW-8
}; ~JOC8dO
8`q"] BQN
private static Sort[] impl=new Sort[]{ '^.3}N{Fo
new InsertSort(), oCB#i~|>a
new BubbleSort(), w5a;ts_x
new SelectionSort(), <@qJsRbhK
new ShellSort(), h9+76
new QuickSort(), <{.pYrn
new ImprovedQuickSort(), H`T}k+e2-N
new MergeSort(), wgZ6|)!0
new ImprovedMergeSort(), /tqe:*
new HeapSort() $XrX(l5
}; Y,X0x-
\~""<*Hz
public static String toString(int algorithm){ 8b+%:eJ
return name[algorithm-1]; !GoHCe[10
} =#vU$~a
N gOc2I
public static void sort(int[] data, int algorithm) { Vc "+|^
impl[algorithm-1].sort(data); -4S4I
} zHvW@A'F
.H5^N\V|
public static interface Sort { 0Y*Ag,S
public void sort(int[] data); v0+$d\mP4<
} [<#`@Kr
<rNz&;m}
public static void swap(int[] data, int i, int j) { OF`:);
int temp = data; aOW$H:b
data = data[j]; 5K$d4KT
data[j] = temp; +kOXa^K
} )'`@rq!
} FX/f0C3CK