[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; *#?9@0b@
} EW`WFBjj
int i1=l; -0NkAQrg
int i2=mid+1; [I<J6=
for(int cur=l;cur<=r;cur++){ wCj)@3F
if(i1==mid+1) hwi_=-SL
data[cur]=temp[i2++]; pm[i#V<v
else if(i2>r) 66_=bd(9
data[cur]=temp[i1++]; /pLf?m9
else if(temp[i1] data[cur]=temp[i1++]; oBo |eRIt|
else x7jFYC
data[cur]=temp[i2++]; %ca`v;].
} 6J$I8b#/
} ]Qp-$)N
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} g$/7km{TP
pRjrMS
改进后的归并排序: wMCgLh\wi
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package org.rut.util.algorithm.support; (_gt!i{h
Y\4B2:Qd9
import org.rut.util.algorithm.SortUtil; )N\BC
/paZJ}Pr.
/** )%8st'
* @author treeroot .O&YdUo
* @since 2006-2-2 uy<b5.!-
* @version 1.0 G2P:|R
*/ TDy$Mv=y
public class ImprovedMergeSort implements SortUtil.Sort { <HpUP!q8v
l$R9c+L=
private static final int THRESHOLD = 10; {/48n83n
,*m|Lt%;R
/* 'S&Zq:
* (non-Javadoc) {* w _*
* ETdN<}m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :$P1ps3B
*/ d%E*P4Ua
public void sort(int[] data) { GR 1%(,
int[] temp=new int[data.length]; Cyo:Da A
mergeSort(data,temp,0,data.length-1); Y'+KU/H
} x>T+k8[n
K<pZ*l
private void mergeSort(int[] data, int[] temp, int l, int r) { J*Cf1 D5!
int i, j, k; H"?Ndl:
int mid = (l + r) / 2; VG50n<m9
if (l == r) ~K(mt0T)
return; BV}sN{
if ((mid - l) >= THRESHOLD) EDF0q i
mergeSort(data, temp, l, mid); .%M80X{5~
else <l eE.hhf.
insertSort(data, l, mid - l + 1); ;Qc^xIPy
if ((r - mid) > THRESHOLD) WQBV~.<Yv
mergeSort(data, temp, mid + 1, r); G%K&f1q%
else xNLgcb@v>
insertSort(data, mid + 1, r - mid); q:vGGK^
Lnq CHe
for (i = l; i <= mid; i++) { )FfS7 C\.
temp = data; =gZA9@]W2
} vM:c70=
for (j = 1; j <= r - mid; j++) { t=jG$A
temp[r - j + 1] = data[j + mid]; ^U,Dx
} gplrJaH@
int a = temp[l]; i#*lK7
int b = temp[r]; 7[0CVWs,
for (i = l, j = r, k = l; k <= r; k++) { 4jjo%N
if (a < b) { }I18|=TB
data[k] = temp[i++]; =&DuQvN,
a = temp; sJ5#T iX
} else { %D% Ok7s})
data[k] = temp[j--]; +NeoGnj
b = temp[j]; ,F "P/`i'
} ni<\AF]`
} 8u1?\SYnb
} <vxTfE@>bp
GBT219Z@8
/** Wy /5Qw~s
* @param data (io[O?te
* @param l 4C*0MV
* @param i O&VA79\UO
*/ {Wfwf
private void insertSort(int[] data, int start, int len) { - "{hP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J\J3'u
} P=s3&NDD
} 4`Jf_C
} J]Rh+@r.
} Id8e%)
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堆排序： *V[I&dKq
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package org.rut.util.algorithm.support; =CjWPZShV
~w.y9)",
import org.rut.util.algorithm.SortUtil; `v'yGsIV
lc]cs D
/** @iBmOt>3
* @author treeroot g(G$*#}o8A
* @since 2006-2-2 SN[ar&I
* @version 1.0 'Axe:8LA'
*/ t5P8?q\
public class HeapSort implements SortUtil.Sort{ f6PYB&<1
J.O{+{&cd
/* (non-Javadoc) Zvra >%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u EERNo&
*/ bHXoZix
public void sort(int[] data) { w U1[/
MaxHeap h=new MaxHeap(); MIN}5kc<
h.init(data); O:imX>|u
for(int i=0;i h.remove(); a^Q ?K\c4N
System.arraycopy(h.queue,1,data,0,data.length); .*z$vl
} \c!e_rZ
#CW{y?=
private static class MaxHeap{ bik lja
aadw#90
void init(int[] data){ BaMF5f+
this.queue=new int[data.length+1]; >ZU)bnndA
for(int i=0;i queue[++size]=data; @3~Wukc
fixUp(size); 6^2='y~e
} %:sP#BQM
} 1{1mL-I;
+I}!)$/
private int size=0; 0sCWIGUW
5@pLGMHT
private int[] queue; (CAkzgTfc
&[N_{O|
public int get() { @xk;]H80
return queue[1]; t[AA=
} .z*}%,G
6uX,J(V,
public void remove() { 64^l/D(
SortUtil.swap(queue,1,size--); 7loWqZ
fixDown(1); V6kDyl(
} ID<[=es6
file://fixdown z.OJ1vY7
private void fixDown(int k) { ?JW/Stua
int j; Jid_&\
while ((j = k << 1) <= size) { $4^h>x
if (j < size %26amp;%26amp; queue[j] j++; \XfLTv
if (queue[k]>queue[j]) file://不用交换 JbN,K
break; f'BmIFb#
SortUtil.swap(queue,j,k); [@]i_L[
k = j; L=WKqRa>4
} >X5RRSo
} Pu'NSNT
private void fixUp(int k) { K@{R?j/+
while (k > 1) { xqauSW
int j = k >> 1; (UTA3Db
if (queue[j]>queue[k]) $bN_0s0:'
break; Xo6zeLHO
SortUtil.swap(queue,j,k); -U\s.FI.AR
k = j; $+,kibk*R
} R3.8Dr0f
} 9! yDZ<s
BL-7r=Z
} 6_:KFqc W
w{4#Q[
} Qv)DSl
+ +Eu.W;&#
SortUtil： ME.!l6lm\
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package org.rut.util.algorithm; |D[LU[<C
E 0@u|
import org.rut.util.algorithm.support.BubbleSort; ]Y$jc
import org.rut.util.algorithm.support.HeapSort; m';4`Y5-
import org.rut.util.algorithm.support.ImprovedMergeSort; *Xn6yL9
import org.rut.util.algorithm.support.ImprovedQuickSort; O5:[]vIn
import org.rut.util.algorithm.support.InsertSort; A+z}z@K
import org.rut.util.algorithm.support.MergeSort; 1DN
import org.rut.util.algorithm.support.QuickSort; y(Em+YTD
import org.rut.util.algorithm.support.SelectionSort; 6=*n$l#}
import org.rut.util.algorithm.support.ShellSort; xhB-gG=
_,f7D/dq
/** X+/^s)
* @author treeroot \KKE&3=
* @since 2006-2-2 ~y/qm [P
* @version 1.0 "#h/sAIs
*/ `1#Z9&bO
public class SortUtil { Q<yvpT(
public final static int INSERT = 1; t"5ZYa
public final static int BUBBLE = 2; R?Ch8mW.!
public final static int SELECTION = 3; '<O.J(N~4!
public final static int SHELL = 4; 162Dj$
public final static int QUICK = 5; &G?w*w_n
public final static int IMPROVED_QUICK = 6; ~ cI`$kJ
public final static int MERGE = 7; j9BcoEl:;
public final static int IMPROVED_MERGE = 8; /4upw`35]
public final static int HEAP = 9; c@KNyBy2
>GmO8dK
public static void sort(int[] data) { &4*f28 s
sort(data, IMPROVED_QUICK); vtc%MG1
} Ga pM~~
private static String[] name={ /!60oV4p0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <)"2rxX&5
}; *zdUCX
d^0-|sx
private static Sort[] impl=new Sort[]{ E#cu}zi
new InsertSort(), b{ tp qNm~
new BubbleSort(), t7*F,
new SelectionSort(), 'u_j5
new ShellSort(), 4~hP25q
new QuickSort(), ={jj'X9
new ImprovedQuickSort(), 5D mSgP:
new MergeSort(), cs4IO O$
new ImprovedMergeSort(), }|j#C[
new HeapSort() A[^k4>
}; gm1RQ^n,@.
]}.|b6\
public static String toString(int algorithm){ o?aF
return name[algorithm-1]; wBEBj7(y
} FMitIM*]
![eipOX
public static void sort(int[] data, int algorithm) { HaRx(p0
impl[algorithm-1].sort(data); ~RV9'v4
} gRZ!=z[&
Dj3,SJ*x
public static interface Sort { Rk{vz|
public void sort(int[] data); %2^V.`0T
} K1o&(;l8G
_P%PjFQ)
public static void swap(int[] data, int i, int j) { \7e4t
int temp = data; ?iL-2I3*
data = data[j]; EH'eyC-B<
data[j] = temp; Z5`V\$
} PH?<)Wj9i
} ('.I)n