[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; YL5>V$i
} y@apJ;_R-
int i1=l; F!8=FTb
int i2=mid+1; ^@.G,u
for(int cur=l;cur<=r;cur++){ vD=%`G[m
if(i1==mid+1) H+cNX\,
data[cur]=temp[i2++]; fA8ozL T
else if(i2>r) WD?Jk9_F
data[cur]=temp[i1++]; T{-2fp8r[
else if(temp[i1] data[cur]=temp[i1++]; 30 7fBa
else J_ V,XO
data[cur]=temp[i2++]; ?q%b*Ek
} FDLd&4Ex
} V-vlTgemwc
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} k:P$LzIB
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改进后的归并排序: SFO&=P:U
D<nxr~pQ
package org.rut.util.algorithm.support; w:Q|?30
2a[9h#
import org.rut.util.algorithm.SortUtil; En5!"w|j
KU2$5[~j
/** fI11dE9&?[
* @author treeroot 1VfSSO
* @since 2006-2-2 #pu}y,QN$
* @version 1.0 g@E&uyM
*/ K}2Npo FS
public class ImprovedMergeSort implements SortUtil.Sort { dt~iw
]P*!'iYN(
private static final int THRESHOLD = 10; 97x%w]kV
wD=am
/* R{<Y4C2~
* (non-Javadoc) BLW]|p|1:
* %c1FwAC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z~.9@[LG]
*/ v>at/ef
public void sort(int[] data) { _0]QS4a][c
int[] temp=new int[data.length]; uL>:tb
mergeSort(data,temp,0,data.length-1); [.U^Wrd
} =>YvA>izE
!`C%Fkq
private void mergeSort(int[] data, int[] temp, int l, int r) { {8ECNQ[]
int i, j, k; VR v02m5
int mid = (l + r) / 2; yqBa_XPV8
if (l == r) 1NGyaI
return; 73pC
if ((mid - l) >= THRESHOLD) ]BfR.,,
mergeSort(data, temp, l, mid); ;z0"Ox=7
else Nu+wL>t
insertSort(data, l, mid - l + 1); 6EP~F8Kd
if ((r - mid) > THRESHOLD) YZ*{^'
mergeSort(data, temp, mid + 1, r); hfh.eL
else x3;jWg~'
insertSort(data, mid + 1, r - mid); s7|3zqi
x@ 6\Ob
for (i = l; i <= mid; i++) { Jy`G]]?
temp = data; \-G5l+!
} j]HE>
for (j = 1; j <= r - mid; j++) { uTw|Q{f
temp[r - j + 1] = data[j + mid]; {jhcZ"#>\
} &oc_a1R
int a = temp[l]; 2+&R"#I
int b = temp[r]; r./z,4A`
for (i = l, j = r, k = l; k <= r; k++) { #4q1{)=
if (a < b) { gA"<MI'y
data[k] = temp[i++]; +{Gw9h"5g*
a = temp; N&N 82OG
} else { =g[H]-Ee
data[k] = temp[j--]; {]@Qu"M
b = temp[j]; X{'wWWZC
} &%}6q]e
} X?kPi&ru
} 1!f2*m
LK %K0o
/** V^ Y*xZ
* @param data 'ucGt
* @param l 4)E|&)-fu8
* @param i dv[\.T`LY
*/ J5-rp|
private void insertSort(int[] data, int start, int len) { 3z$HKG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /evaTQPz
} #Wq#beBb
} Q_v\1"c
} 3f,u}1npa*
} Y 0]Kl^\A
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堆排序： -g<cinNSp
tnNZ`]qY
package org.rut.util.algorithm.support; Lv^a+'
#a.\P.{L
import org.rut.util.algorithm.SortUtil; Kf&r21h
S8vx[<
/** 6_Fpca3L
* @author treeroot UMv"7~
* @since 2006-2-2 :;<\5Oy ^
* @version 1.0 1=ip,D
*/ sD.6"w7}
public class HeapSort implements SortUtil.Sort{ $Llvp bl
wYa0hNd
/* (non-Javadoc) tw]/,>\G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y 'mlee
*/ TXx'7[
public void sort(int[] data) { v=j>^FZ
MaxHeap h=new MaxHeap(); GU5W|bS
h.init(data); *|sxa#
for(int i=0;i h.remove(); ujow?$&
System.arraycopy(h.queue,1,data,0,data.length); 9ec0^T
} v<%]XHN
XEa~)i{O
private static class MaxHeap{ X+d&OcO=q
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void init(int[] data){ ~DK F%}E
this.queue=new int[data.length+1]; }]tFz}E\
for(int i=0;i queue[++size]=data; Bmmb
fixUp(size); ::0aY;D2
} G^ K*+
} AmgWj/>
>@z d\}@W
private int size=0; j,Pwket
pEY>A_F
private int[] queue; Q;=6ag'
#`r(zI[
public int get() { +_P8'e%Iy
return queue[1]; dEL3?-;'
} 5Zzr5WM
n#)PvV~
public void remove() { C0P*D,
SortUtil.swap(queue,1,size--); K*0aXr?
fixDown(1); jGJ.Pvc>i
} ;gdi=>S_
file://fixdown S_ZLTcq<1
private void fixDown(int k) { Al=(sHc'
int j; ~v^%ze
while ((j = k << 1) <= size) { Ri9Kr
if (j < size %26amp;%26amp; queue[j] j++; id3)6}
if (queue[k]>queue[j]) file://不用交换 ^}>zYt
break; q^)=F_QvG
SortUtil.swap(queue,j,k); p1Y+
k = j; b{zAJ`|#[n
} -3u@hp_
} /rn"
private void fixUp(int k) { vU?b"n
while (k > 1) { GJ.kkTMT
int j = k >> 1; OiYNH~hv
if (queue[j]>queue[k]) u,:CJ[3
break; j l}!T[5
SortUtil.swap(queue,j,k); Fecx';_1`
k = j; q;CayN'I
} w9/nVu
} >0kmRVd
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} xi;/^)r
U? {'n#n 5
} _{[k[]
MV% :ES?
SortUtil： M' a&
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package org.rut.util.algorithm; ,}eRnl\
sM#!Xl;
import org.rut.util.algorithm.support.BubbleSort; V h Z=,m
import org.rut.util.algorithm.support.HeapSort; .WBI%ci
import org.rut.util.algorithm.support.ImprovedMergeSort; x-w`KFS
import org.rut.util.algorithm.support.ImprovedQuickSort; j2< !z;2
import org.rut.util.algorithm.support.InsertSort; eo>/
import org.rut.util.algorithm.support.MergeSort; dCa}ITg
import org.rut.util.algorithm.support.QuickSort; MFf05\aDu
import org.rut.util.algorithm.support.SelectionSort; cWgbd^J
import org.rut.util.algorithm.support.ShellSort; unCt4uX^
Vf"O/o}hq,
/** Uc_'3|e
* @author treeroot LDT'FwMjy
* @since 2006-2-2 z0\;m{TH
* @version 1.0 GS$ZvO
*/ c-[Q,c
public class SortUtil { aQl?d<|+lk
public final static int INSERT = 1; 7(yXsVq
public final static int BUBBLE = 2; }f<fgY
public final static int SELECTION = 3; [?Mc4uT{
public final static int SHELL = 4; C/{nr-V3u
public final static int QUICK = 5; 6{b%Jfo
public final static int IMPROVED_QUICK = 6; Wv6z%r<
public final static int MERGE = 7; CPc"
public final static int IMPROVED_MERGE = 8; dE 3i=
public final static int HEAP = 9; I;`Ko_i
04I6-}6
public static void sort(int[] data) { Y&oP>n! ei
sort(data, IMPROVED_QUICK); ):/<H
} y_}K?
private static String[] name={ ~C}(\8g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?2JS&i
}; z*Myokhf
9\AEyaJFZ
private static Sort[] impl=new Sort[]{ 1m&!l6Jk
new InsertSort(), ^U-vD[O8
new BubbleSort(), Sf+(1_^`t
new SelectionSort(), ZcUh[5:|
new ShellSort(), p_rN1W Dd'
new QuickSort(), 7yMieUF
new ImprovedQuickSort(), %Nwyx;>9^K
new MergeSort(), EpFIKV!
new ImprovedMergeSort(), :pA=V
new HeapSort() g_rA_~dh
}; e8~62O^
9f@#SB_H
public static String toString(int algorithm){ 5QqJI#4~
return name[algorithm-1]; kGB#2J
} y8<lp+
NYSj^k;^(z
public static void sort(int[] data, int algorithm) { F'V+2,.
impl[algorithm-1].sort(data); c7FfI"7HR
} #Pb7EL#c
M!xm1-,[
public static interface Sort { (hhdbf
public void sort(int[] data); 5@w'_#!)
} <Z\MZ&{k{*
C5:dO\?O
public static void swap(int[] data, int i, int j) { [JX}1%NA
int temp = data; M9uH&CD6U
data = data[j]; ef;&Y>/
data[j] = temp; 'DL;c@}37
} zPX=MfF
} @&~OB/7B: