[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; RDZq(rKc
} m ;KP
int i1=l; SAoqq
int i2=mid+1; ^\CQWgY(
for(int cur=l;cur<=r;cur++){ n-\B z.
if(i1==mid+1) |fA[s7)
data[cur]=temp[i2++]; MHbRG_zW
else if(i2>r) x}roPhZ
data[cur]=temp[i1++]; E*ic9Za8`h
else if(temp[i1] data[cur]=temp[i1++]; 9-@w(kMu
else x?%vqg^r
data[cur]=temp[i2++]; tsk}]@W
} QL)UPf>Kp
} AiyjrEa%
<wuP*vI"h
} |9Y9pked8
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改进后的归并排序: mkWIJH
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package org.rut.util.algorithm.support; X3"V1@-i4$
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import org.rut.util.algorithm.SortUtil; 4j | vzyc
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/** PaZFM
* @author treeroot Qj=l OhM
* @since 2006-2-2 R_*\?^k|A
* @version 1.0 "L,FUo^&
*/ _ 9k^Hd[L$
public class ImprovedMergeSort implements SortUtil.Sort { W$3p,VTMmB
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private static final int THRESHOLD = 10; 6^zv:C%
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/* USbiI%
* (non-Javadoc) 06ueE\@Sg
* )~5`A*Ku
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $DMeUA\av
*/ #e#8I7P
public void sort(int[] data) { ;6]+/e7O
int[] temp=new int[data.length]; *L^{p.K4
mergeSort(data,temp,0,data.length-1); =tP|sYR]^
} Ri,UHI4 W
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private void mergeSort(int[] data, int[] temp, int l, int r) { _Y0o\0B
int i, j, k; >Z3}WMgBN
int mid = (l + r) / 2; 1|gEY;Ru
if (l == r) &&m%=i.qK
return; ,wq.C6;&
if ((mid - l) >= THRESHOLD) RJWlG'i
mergeSort(data, temp, l, mid); ('gjfl
else MAR;k?d
insertSort(data, l, mid - l + 1); :+;F"_
if ((r - mid) > THRESHOLD) |e9}G,1
mergeSort(data, temp, mid + 1, r); h?TE$&CL?
else YZoudX'"
insertSort(data, mid + 1, r - mid); KavRW.w
nc31X
for (i = l; i <= mid; i++) { :;JJvYIs
temp = data; +28FB[W
} <y!BO
for (j = 1; j <= r - mid; j++) { QQ?` 1W
temp[r - j + 1] = data[j + mid]; 8kqxr&,[
} *</;:?
int a = temp[l]; b\^.5SEw
int b = temp[r]; /fD)/x
for (i = l, j = r, k = l; k <= r; k++) { >N*QK6"=|
if (a < b) { 4];NX
data[k] = temp[i++]; h)YqC$A-s
a = temp; q<7Nz]Td
} else { yx-{}Yj^
data[k] = temp[j--]; LAr6J
b = temp[j]; 0nl)0|?Az
} #v`G4d
} ?W#! S
} }R>g(q=N
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/** S'A~9+
* @param data MVTU$ 65
* @param l p%G\5.GcJL
* @param i beq)Frn^
*/ r67 3+
private void insertSort(int[] data, int start, int len) { xWV_Do)z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xi.;`Q^#
} hTy#Q.=
} 7?kvrIuY&
} :Z/ig%
} ir\
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堆排序： O4}cv
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package org.rut.util.algorithm.support; '[A>eC++
mB!81%f%|
import org.rut.util.algorithm.SortUtil; X/.|S57
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/** \F<]l6E
* @author treeroot *D\nsJ*g
* @since 2006-2-2 |D^[]*cEH
* @version 1.0 Ak1f*HGl|
*/ )JZfC&,
public class HeapSort implements SortUtil.Sort{ 4BCZ~_
,2]6cP(6qQ
/* (non-Javadoc) M"P$hb'F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -Y+[`0$'
*/ M r@M~ -
public void sort(int[] data) { K&S~IFy
MaxHeap h=new MaxHeap(); u{\`*dNx
h.init(data); S4tdWA
for(int i=0;i h.remove(); zKI(yC
System.arraycopy(h.queue,1,data,0,data.length); F 6SIhf.;
} 'T.> oP0>
kDm=Cjxv
private static class MaxHeap{ z~X]v["d
K7y}R%QF
void init(int[] data){ a#mdD:,cF
this.queue=new int[data.length+1]; $+rdzsf)+/
for(int i=0;i queue[++size]=data; .Wb),
fixUp(size); Xe* L^8+
} 2 OGg`1XX
} '9b<r7\@
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private int size=0; b9:E0/6
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private int[] queue; qC]D9 A
%u!#f<"[
public int get() { OtnYv
return queue[1]; ]P 2M
} (apAUIE
uT=sDWD:
public void remove() { 2Yyc`o0R;h
SortUtil.swap(queue,1,size--); W<58TCd
fixDown(1); NW~n+uk5v
} dLo%+V#/A
file://fixdown ] e&"CF
private void fixDown(int k) { .kBAUkL:
int j; 8^HMK$
while ((j = k << 1) <= size) { ^^)Pv#[3
if (j < size %26amp;%26amp; queue[j] j++; {E@@14]g
if (queue[k]>queue[j]) file://不用交换 b@,w/Uw[*
break; !ZB|GLpo6
SortUtil.swap(queue,j,k); v1;`.PWD
k = j; mjH8q&szf
} tFb49zbk
} 8XTVpf4
private void fixUp(int k) { BV7GzJ2([{
while (k > 1) { }-Zfljj
int j = k >> 1; ;}:"[B3$
if (queue[j]>queue[k]) EI+.Q
break; u(d>R5}'
SortUtil.swap(queue,j,k); cU*7E39
k = j; ogPxj KSI
} }z[O_S,X
} `< VoZ/v
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} rj,Sk~0Q
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} ww[STg
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SortUtil： ~r=u1]z
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package org.rut.util.algorithm; Oa*/jZjr
KaO8rwzDN
import org.rut.util.algorithm.support.BubbleSort; zQ7SiRt7*
import org.rut.util.algorithm.support.HeapSort; _a c_8m
import org.rut.util.algorithm.support.ImprovedMergeSort; Fnr*.k
import org.rut.util.algorithm.support.ImprovedQuickSort; ,A_itRHH
import org.rut.util.algorithm.support.InsertSort; G;,2cu K
import org.rut.util.algorithm.support.MergeSort; D<nTo&m_
import org.rut.util.algorithm.support.QuickSort; C[wnor!
import org.rut.util.algorithm.support.SelectionSort; "< [D1E\
import org.rut.util.algorithm.support.ShellSort; Tqm9><!r
Ma_! 1Y
/** >)!"XFbb
* @author treeroot 2)mKcUL-
* @since 2006-2-2 ^2Op?J
* @version 1.0 )D(XDN
*/ AEEy49e
public class SortUtil { |f`!{=?
public final static int INSERT = 1; I_N"mnn@Nr
public final static int BUBBLE = 2; pcL02W|J
public final static int SELECTION = 3; G!%1<SLi.
public final static int SHELL = 4; vsLn@k3
public final static int QUICK = 5; /I: d<A
public final static int IMPROVED_QUICK = 6; ~!Onz wmO
public final static int MERGE = 7; ^${-^w@,%V
public final static int IMPROVED_MERGE = 8; 011 _(v
public final static int HEAP = 9; O4( Z%YBe
tt#M4n@
public static void sort(int[] data) { g_.BJ>Uv
sort(data, IMPROVED_QUICK); u},<On
} 00<iv"8
private static String[] name={ 2D&tDX<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KWU#Swa`
}; 6\'v_A O
>b<br
private static Sort[] impl=new Sort[]{ Z+Z`J; ,
new InsertSort(), <L:v28c
new BubbleSort(), 6`F_js.a
new SelectionSort(), #|2w^Kn
new ShellSort(), +-HaYB|p
new QuickSort(), `N2zeFG
new ImprovedQuickSort(), 4uDz=B+8y
new MergeSort(), c1e7h l
new ImprovedMergeSort(), U =T[-(:H
new HeapSort() W0l|E&fj[
}; t5[{ihv~:
hm?-QVRPV
public static String toString(int algorithm){ 9KD2C>d<
return name[algorithm-1]; Ujb||(W
} b Kv9F@
k1B7uA'h"G
public static void sort(int[] data, int algorithm) { O!uX:TE|Q
impl[algorithm-1].sort(data); 5(TI2,4
} 7?/ Fr(\
vhdT"7`U
public static interface Sort { %vn rLt$
public void sort(int[] data); !d%OoRSU'
} ]Jm9D=
=suj3.
public static void swap(int[] data, int i, int j) { 8vc4J5
int temp = data; 5U%uS^%DP
data = data[j]; :6Bk<
data[j] = temp; PK!=3fK4\F
} ^yjc"r%B
} &!Y^DR/