[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; Iv{}U\ u
} t<e?f{Q5
int i1=l; s#4 "f
int i2=mid+1; l!oU9
for(int cur=l;cur<=r;cur++){ u", [ulP
if(i1==mid+1) pPIH`Iq
data[cur]=temp[i2++]; Va1|XQ<CL
else if(i2>r) 9Vp$A$7M
data[cur]=temp[i1++]; }>grGr%oR
else if(temp[i1] data[cur]=temp[i1++]; U8moVj8w1
else `aCcTs7~]p
data[cur]=temp[i2++]; zP5HTEz
} rIu>JyC"p
} o}[wu:>yk
1f}Dza9
} 77)C`]0(
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改进后的归并排序: .9`.\v6R
h322^24-2
package org.rut.util.algorithm.support; il:+O08_
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import org.rut.util.algorithm.SortUtil; g >X!Q
F.JE$)B2EX
/** nF7Ozxm#
* @author treeroot >:Rc%ILym
* @since 2006-2-2 tf>?;
* @version 1.0 C3D1rS/I
*/ &ed.%:
public class ImprovedMergeSort implements SortUtil.Sort { P*\.dAi
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private static final int THRESHOLD = 10; =s;7T!7!
: G<1
/* OYe @P
* (non-Javadoc) uHy^ Bq
* !W8$-iq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dD#A.C,Rz
*/ 3Y>!e#
public void sort(int[] data) { lx%<oC+M
int[] temp=new int[data.length]; qg+8i9Y!
mergeSort(data,temp,0,data.length-1); qF>}"m
} *r[PZ{D+
;X\,-pjv
private void mergeSort(int[] data, int[] temp, int l, int r) { (d@lG*K
int i, j, k; s$mcIMqs
int mid = (l + r) / 2; ujHqwRh
if (l == r) `2{x8A
return; tM~R?9OaJ
if ((mid - l) >= THRESHOLD) K4y4!zz
mergeSort(data, temp, l, mid); `^RpT]S
else {gzL}KL
insertSort(data, l, mid - l + 1); EWbFy"=
if ((r - mid) > THRESHOLD) B1 'Ds
mergeSort(data, temp, mid + 1, r); &g|-3)A
else 3. Kh
insertSort(data, mid + 1, r - mid); ,LG6py&aT
!MoGdI-<r[
for (i = l; i <= mid; i++) { CmM K\R.
temp = data; _8kZ>w(L
} -fYgTst2
for (j = 1; j <= r - mid; j++) { I9H+$Wjd
temp[r - j + 1] = data[j + mid]; =! /S |
} Ow<=K:^
int a = temp[l]; h%pgdix
int b = temp[r]; $:SHZe
for (i = l, j = r, k = l; k <= r; k++) { k/cQJz
if (a < b) { ?PLf+S
data[k] = temp[i++]; Hcuvu[)T"
a = temp; )V} t(>V
} else { ;ZB[g78%R%
data[k] = temp[j--]; UZv^3_,qz
b = temp[j]; IrJCZsk
} e5C560
} }>>BKn
} V{ECDgP
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/** d XrLeoK
* @param data "\Z.YZUa\
* @param l +wr2TT~
* @param i ;i>|5tEy
*/ *JUP~/Nr
private void insertSort(int[] data, int start, int len) { Ac|IBXGa=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?(4=:o
} yY[N\*P
} cd#@"&r
} `q".P]wtKN
} g7rn|<6FI
hr(E,TAe
堆排序： {|bf`
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package org.rut.util.algorithm.support; hxGZ}zq*S
~+7q.XL$$K
import org.rut.util.algorithm.SortUtil; .9PPWY;H
RdRF~~R%
/** ^,qi`Tk
* @author treeroot 7NE"+EP\{2
* @since 2006-2-2 Rra<MOR
* @version 1.0 FY@ErA7~
*/ UW_fn
public class HeapSort implements SortUtil.Sort{ =E,^ +`M
>S,yqKp37~
/* (non-Javadoc) GMyzQ]@}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n3-5`Jti
*/ p<: bPw
public void sort(int[] data) { :'|%~&J
MaxHeap h=new MaxHeap(); F$F,I,$ "
h.init(data); ?I6!m~
for(int i=0;i h.remove(); \ym3YwP4/:
System.arraycopy(h.queue,1,data,0,data.length); &;DK^ta*P
} jTH,GF
v=R=K
private static class MaxHeap{ V)mitRaV
pqmtN*zV
void init(int[] data){ |VQ17*4ff1
this.queue=new int[data.length+1]; xy5&}_Y
for(int i=0;i queue[++size]=data; DY/xBwIF
fixUp(size); +`>Tuz~
} \]1qAFB5
} ZF!cXo7d
w9Bbvr6
private int size=0; SvLI%>B=9
7j| ^ZuI+
private int[] queue; * G!C 'w\$
XvETys@d
public int get() { SfLZVB
return queue[1]; xp7`[.
} c@>Tzk%?"
FL*qV"r^n
public void remove() { XEl-5-M"
SortUtil.swap(queue,1,size--); )O*\}6:S
fixDown(1); 3|x*lmit
} :[YHJaK
file://fixdown *")Req
private void fixDown(int k) { [|.IXdJ!
int j; =bgzl=A`
while ((j = k << 1) <= size) { 0A9llE
if (j < size %26amp;%26amp; queue[j] j++; K[r<-6TS
if (queue[k]>queue[j]) file://不用交换 %38HGjS
break; 1fUg
SortUtil.swap(queue,j,k); ova4
k = j; cNOtfn6?F
} ^h\& l{e
} WR,MqM20
private void fixUp(int k) { Is57)(^.-
while (k > 1) { W<| M0S{
int j = k >> 1; !Lkk1zo
if (queue[j]>queue[k]) m[n=t5~
break; g9C/Oj`I
SortUtil.swap(queue,j,k); wX<w)@
k = j; XT+V> HI
} 89hV{^
} i7D[5!
Vi1l^ Za
} ?i'N9 /(
F#NuZ'U
} 4:wVT;?a
v_^>*Vm*
SortUtil： U1nObA
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package org.rut.util.algorithm; 7W[+e&
)<YfLDgTs
import org.rut.util.algorithm.support.BubbleSort; 6.5E d-
import org.rut.util.algorithm.support.HeapSort; v *icoj
import org.rut.util.algorithm.support.ImprovedMergeSort; O?,Grn%'.
import org.rut.util.algorithm.support.ImprovedQuickSort; Pa)'xfQ$Y6
import org.rut.util.algorithm.support.InsertSort; M18>%zM
import org.rut.util.algorithm.support.MergeSort; 5?l8;xe`{f
import org.rut.util.algorithm.support.QuickSort; x Zp`
import org.rut.util.algorithm.support.SelectionSort; gi {rqM
import org.rut.util.algorithm.support.ShellSort; k4T`{s}e
KEfN!6
/** Uzh#zeZ`<
* @author treeroot cPunMHD
* @since 2006-2-2 qh9d.Q+n
* @version 1.0 O1+OE!w
*/ QrBb!.r
public class SortUtil { L;RHshTy
public final static int INSERT = 1; gpT~3c;l=
public final static int BUBBLE = 2; Z=R 6?jU*n
public final static int SELECTION = 3; -A]-o
public final static int SHELL = 4; '`+8'3K~E
public final static int QUICK = 5; JsP<etX
public final static int IMPROVED_QUICK = 6; ~aBf.
public final static int MERGE = 7; (>49SOu;$\
public final static int IMPROVED_MERGE = 8; ~}"5KX\=#
public final static int HEAP = 9; C*X=nezq
ibP IT!5c
public static void sort(int[] data) { 3ch<a0
sort(data, IMPROVED_QUICK); +-X 68`
} ,{6Vf|?
private static String[] name={ )x5t']w`K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4yK{(!&i+
}; '8w}m8{y
{<cL@W
private static Sort[] impl=new Sort[]{ B)/L[ )S
new InsertSort(), E4N/or
new BubbleSort(), DbWaF5\yD
new SelectionSort(), 1VKu3
new ShellSort(), $U=j<^R}a
new QuickSort(), l"zwH
new ImprovedQuickSort(), D?.H|%
new MergeSort(), Y~TD)c=
new ImprovedMergeSort(), '2z1$zst,#
new HeapSort() ^V}c8 P|
}; @ /.w%
Y;)l
public static String toString(int algorithm){ P+L#p(K
return name[algorithm-1]; :X*$U ~aQ
} +lplQh@RB
&M>o
public static void sort(int[] data, int algorithm) { vc%=V^)N7U
impl[algorithm-1].sort(data); [CG3&J
} b^:frjaE3
^]5^p9Jt"e
public static interface Sort { k3+LP7|*
public void sort(int[] data); 1,7
} 3ncN)E/@
;e)`Cv
public static void swap(int[] data, int i, int j) { ;RK;kdZ
int temp = data; &j}:8Tst
data = data[j]; BaVooN~C
data[j] = temp; =28ZSo^
} 9^+E$V1@
} K+\2cf?bU