[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; Ma% E&.ed
} 22l|!B%o
int i1=l; 2=i+L z^
int i2=mid+1; U&w*Sb"
for(int cur=l;cur<=r;cur++){ 8''9@xz
if(i1==mid+1) YhEiN. ~
data[cur]=temp[i2++]; @ARAX\F
else if(i2>r) "K9vm^xP
data[cur]=temp[i1++]; wa9'2a1?
else if(temp[i1] data[cur]=temp[i1++]; Ej-=y2j{g
else ;JMOsn}8
data[cur]=temp[i2++]; n%7A;l!{
} ?,.HA@T%
} \Mobq
E|KLK4]
} BnY\FQ)K
mABwM$_
改进后的归并排序: ?FkQe~FN{
N:m@D][/sW
package org.rut.util.algorithm.support; JrY"J]/
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import org.rut.util.algorithm.SortUtil; R^n* o
8#[%?}tK
/** 8Cf^$
* @author treeroot @h,h=X
* @since 2006-2-2 ^(E"3 c
* @version 1.0 EKeBTb
*/ sa\|"IkD2
public class ImprovedMergeSort implements SortUtil.Sort { Sn{aHH
n_e}>1_
private static final int THRESHOLD = 10; ymzPJ??!
<z~2d
/* HYa$EE2
* (non-Javadoc) C*Y :w
* _47j9m]f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r"HbrQn
*/ 8u7K$Q
public void sort(int[] data) { gPA>*;?E;@
int[] temp=new int[data.length]; V1UUAvN7s
mergeSort(data,temp,0,data.length-1); >"PqQO
} '@3a,pl
b |o`Q7Hj
private void mergeSort(int[] data, int[] temp, int l, int r) { yg-L^`t+B5
int i, j, k; x mrugNRg
int mid = (l + r) / 2; WrIL]kJw^
if (l == r) >*<6 zQf
return; +73=2.C0
if ((mid - l) >= THRESHOLD) =:ya;k&
mergeSort(data, temp, l, mid); ,?7xb]h
else e0G}$ as
insertSort(data, l, mid - l + 1); lEVQA*u[
if ((r - mid) > THRESHOLD) 2l\D~ y
mergeSort(data, temp, mid + 1, r); oF 1W}DtA
else khKv5K#)
insertSort(data, mid + 1, r - mid); cq@_*:~Or
3.K{T
for (i = l; i <= mid; i++) { Lk8W&|;0|
temp = data; v"G%5pq*\
} ? bUpK
for (j = 1; j <= r - mid; j++) { O,V6hU/ *
temp[r - j + 1] = data[j + mid]; }]Gi@Nh|o
} >yPFL'
int a = temp[l]; =2vMw]
int b = temp[r]; /eU1(oo&`5
for (i = l, j = r, k = l; k <= r; k++) { =0!\F~
if (a < b) { ]iE.fQ?;J
data[k] = temp[i++]; jx5[bUp4u
a = temp; lN][xnP
} else { yccuTQvz
data[k] = temp[j--]; Wzf1-0t
b = temp[j]; f3%^-Uy*b
} +UpMMh q
} #sm_.?P
} Zh fD`@>&
="'P=Xh!8
/** J6^Ct
* @param data JPoK\-9NT
* @param l I]WeZ,E
* @param i *]E7}bqb
*/ 95gsv\2
private void insertSort(int[] data, int start, int len) { wn A%Nh7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ftI+#0?[!
} 0F0Q=dZ
} Aa\=7
} $<>EwW
} Fv7%TK{oe
DESViQM
堆排序： -'p@ lk
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package org.rut.util.algorithm.support; mrLx]og,
057G;u/
import org.rut.util.algorithm.SortUtil; 8.;';[
lu@>?,<
/** /qz "I-a
* @author treeroot |au qj2
* @since 2006-2-2 E23 Yk?"
* @version 1.0 4W//Oc@e
*/ XnI ;7J
public class HeapSort implements SortUtil.Sort{ "jQe\
"<jEI /
/* (non-Javadoc) mZ0oa-Iy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Dr4~7=7a
*/ a@_Cx
public void sort(int[] data) { e ka@?`
MaxHeap h=new MaxHeap(); :?:j$ =nWN
h.init(data); ,O&PLr8cJ?
for(int i=0;i h.remove(); ^ yukn*L
System.arraycopy(h.queue,1,data,0,data.length); a+>W
} ?:''VM.
mP$G9R
private static class MaxHeap{ Jr>S/]"
U3j~}H.D1
void init(int[] data){ gHh.|PysW
this.queue=new int[data.length+1]; @;n$caw
for(int i=0;i queue[++size]=data; VgZaDd;
fixUp(size); ID)gq_k[8,
} -C'X4C+
} c%LB|(@j{
)`+@j.75
private int size=0; @aV~.!!
*A1TDc$
private int[] queue; }jY[| >z
cVHE}0Xd(
public int get() { ">vYEkZ3
return queue[1]; 4wj|
} hpz*jyh8
^3)2]>pW
public void remove() { (~pEro]?+)
SortUtil.swap(queue,1,size--); ~~:8Yv[(
fixDown(1); 97))'gC
} ?.Yw%{?TG
file://fixdown ;`PkmAg
private void fixDown(int k) { ,nChwEn
int j; 7+!7]'V
while ((j = k << 1) <= size) { Y\z\{JW
if (j < size %26amp;%26amp; queue[j] j++; cV_IG}LJ
if (queue[k]>queue[j]) file://不用交换 o(>-:l i0
break; JTh=JHJ
SortUtil.swap(queue,j,k); whm tEY
k = j; -^jLU FC
} 1DlcO>#@
} V-ouIqnI
private void fixUp(int k) { ExP25T
while (k > 1) { j]l}K*8(
int j = k >> 1; hC,-9c
if (queue[j]>queue[k]) nk3<]u
break; aCi^^}!
SortUtil.swap(queue,j,k); pn%|;
k = j; TX [%s@C
} ^YJ^+:D(
} ^RyTK|SQ
n`T[eb~
} NDa|.,
0G\myv
} KJ^GUqVl
=U7D}n hS-
SortUtil： 9H%xZ(`vN
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package org.rut.util.algorithm; hUhp2ibEs
j% USu+&
import org.rut.util.algorithm.support.BubbleSort; 8(/f!~
import org.rut.util.algorithm.support.HeapSort; = 4WZr
import org.rut.util.algorithm.support.ImprovedMergeSort; Nl<,rD+KSD
import org.rut.util.algorithm.support.ImprovedQuickSort; ^}7t:
import org.rut.util.algorithm.support.InsertSort; 7RFkHME
import org.rut.util.algorithm.support.MergeSort; ~5!TV,>ls
import org.rut.util.algorithm.support.QuickSort; Ww tQ>'R"
import org.rut.util.algorithm.support.SelectionSort; jzA8f+:q
import org.rut.util.algorithm.support.ShellSort; wY_-
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/** cASHgm
* @author treeroot +M]8_kE=+l
* @since 2006-2-2 S=amjcC
* @version 1.0 |j}F$*SE[
*/ Y4qyy\}
public class SortUtil { jsaCnm>&
public final static int INSERT = 1; ;,-Vapz
public final static int BUBBLE = 2; Ahbu >LPk
public final static int SELECTION = 3; X|1YGZJ
public final static int SHELL = 4; !K~$-jlT
public final static int QUICK = 5; yj+b/9My
public final static int IMPROVED_QUICK = 6; Hpg;?xAT
public final static int MERGE = 7; b-zX3R;
public final static int IMPROVED_MERGE = 8; /cen#pb
public final static int HEAP = 9; 1`_)%Y[ZJ
dsZ( D:)
public static void sort(int[] data) { w]-iM
sort(data, IMPROVED_QUICK); DF|lUO]:
} "EhO )lR
private static String[] name={ 9x{prCr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hsO.521g
}; d@f2Vxe7
;OJ0}\*iP8
private static Sort[] impl=new Sort[]{ swq!Sp
new InsertSort(), fToI,FA
new BubbleSort(), 5t?2B]
new SelectionSort(), sLqvDH?V
new ShellSort(), Rs[]i;
new QuickSort(), LhRe?U\
new ImprovedQuickSort(), *+Q*&-$
new MergeSort(), E(LE*J
new ImprovedMergeSort(), Vot+gCZ
new HeapSort() %ys}Q!gR
}; @5G7bY7Nz
y]4`d
public static String toString(int algorithm){ ly%B!P|
return name[algorithm-1]; i O|,,;_
} rg/vxTl
azc:C
public static void sort(int[] data, int algorithm) { Hbc&.W;g7[
impl[algorithm-1].sort(data); :=eUNH
} X hX'*{3k
kK|+W,
public static interface Sort { !*UdY(
public void sort(int[] data); {leG~[d
} '\\Cpc_g
J}\]<aC
public static void swap(int[] data, int i, int j) { 4F6o
int temp = data; /-4B)mL
data = data[j]; %\&dFwb
data[j] = temp; wx5*!^&j
} }c5`~ LLK
} #zs\Z]3#