[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; 2{ptV\f]D
} ad"&c*m[
int i1=l; PM_q"}-
int i2=mid+1; ypml22)kz
for(int cur=l;cur<=r;cur++){ Fc nR}TE
if(i1==mid+1) JL*-L*|Zcl
data[cur]=temp[i2++]; }q~A( u
else if(i2>r) oACE:h9U
data[cur]=temp[i1++]; #<?j784
else if(temp[i1] data[cur]=temp[i1++]; 7{b|+0W
else ikY=}
data[cur]=temp[i2++]; a|fyo#L
} ;`xu)08a
} Kj-`ru
MjLyB^M
} ]`|bf2*eA
` "9Y.KU
改进后的归并排序: pZWp2hj{X
.AV--oA~
package org.rut.util.algorithm.support; Tn-H8;Hg
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import org.rut.util.algorithm.SortUtil; }we"IqLb
!867DX3*
/** 2x`# f0[
* @author treeroot m=n V$H
* @since 2006-2-2 1dKLNE
* @version 1.0 ZkK +?:9
*/ Ru sa &#[
public class ImprovedMergeSort implements SortUtil.Sort { ZLO_5#<
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private static final int THRESHOLD = 10; Xe%n.DW m
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/* Ds-%\@p
* (non-Javadoc) 9J1&g(?>-
* 7u!p.kN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t%=ylEPW
*/ *rqih_j0
public void sort(int[] data) { "PlM{ZI\
int[] temp=new int[data.length]; 2 {31"
mergeSort(data,temp,0,data.length-1); r_o2d8
} 5:AAqMa
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private void mergeSort(int[] data, int[] temp, int l, int r) { pM4 j=F
int i, j, k; ))+R*k%
int mid = (l + r) / 2; inhb>zB
if (l == r) O,DA{> *m
return; 6bU/IVP
if ((mid - l) >= THRESHOLD) )"q2DjfX*
mergeSort(data, temp, l, mid); :1AOund
else ^91k@MC
insertSort(data, l, mid - l + 1); L6',s4
if ((r - mid) > THRESHOLD) 1*=[% d7
mergeSort(data, temp, mid + 1, r); Q}1PPi,
else ]zD/W%c
insertSort(data, mid + 1, r - mid); <;acWT?(
2Gx&ECa,
for (i = l; i <= mid; i++) { WLizgVM
temp = data; 4S9AXE6
} ` a@NYi6
for (j = 1; j <= r - mid; j++) { 6v.*%E*P
temp[r - j + 1] = data[j + mid]; {9)LHX7dN
} < 'T6k\
int a = temp[l]; VGe/;&1h
int b = temp[r]; |&C.P?q
for (i = l, j = r, k = l; k <= r; k++) { [y'jz~9c
if (a < b) { 9}":}!
data[k] = temp[i++]; fEM8/bhq
a = temp; fPspJug
} else { C~:aol i;
data[k] = temp[j--]; IoA"e@~t
b = temp[j]; :yw0-]/DD
} u(d>R5}'
} |>p\*Dl}H
} g\n@(T$)
}z[O_S,X
/** `< VoZ/v
* @param data YwKY3kL
* @param l =WN6Fj`
* @param i {U&Mo97rzX
*/ Prr<:q
private void insertSort(int[] data, int start, int len) { a-O9[?G/x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \ar.(J
} A 8&%G8d
} +DVU"d
} B9+oI cO
} ,A_itRHH
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堆排序： 'e0qdY`
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package org.rut.util.algorithm.support; ;g?5V
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import org.rut.util.algorithm.SortUtil; l=kgRh
Dx iCq(;
/** 0PTB3-
* @author treeroot *USZ2|i
* @since 2006-2-2 RU#Q<QI(
* @version 1.0 /eZAAH
*/ N7Dm,Q]
public class HeapSort implements SortUtil.Sort{ '9i:b]Hru
377$c;4F
/* (non-Javadoc) fFiFc^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Ge-7^Fo7
*/ 5$N4<Lo7
public void sort(int[] data) { .XS rLb?
MaxHeap h=new MaxHeap(); R1?g6. Mq
h.init(data); ynDa4HB
for(int i=0;i h.remove(); lHZf'P_Wx
System.arraycopy(h.queue,1,data,0,data.length); NjL,0Bp
} eK`n5Z&Y\
,TP^i 0
private static class MaxHeap{ @{~x:P5g
q"fK"H-j
void init(int[] data){ !+CRS9\D
this.queue=new int[data.length+1]; Qx$Yj
for(int i=0;i queue[++size]=data; #&&^5r-b-
fixUp(size); r?V\X7` +
} U9kt7#@FDK
} A2F+$N
(\M&/X~q
private int size=0; H.Pts>3r(
2<U5d`
private int[] queue; ~vG~Z*F
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public int get() { HQTB4_K\
return queue[1]; %vyjn&13
} <gJ|Wee
m<r.sq&;
public void remove() { oDA1#-
SortUtil.swap(queue,1,size--); e>"{nOY4
fixDown(1); d0IHl!X
} -s4qm)\
file://fixdown zn@tLLX
private void fixDown(int k) { F5&4x"c
int j; L +-B,466
while ((j = k << 1) <= size) { { 5h6nYu
if (j < size %26amp;%26amp; queue[j] j++; %-H
if (queue[k]>queue[j]) file://不用交换 Vk8:;Hj
break; 9%iqequ
SortUtil.swap(queue,j,k); L,Uqt,
k = j; ~h0SD(
} u'LA%l-
} HL*jRl
private void fixUp(int k) { CEZ*a 0}=
while (k > 1) { aRg- rz
int j = k >> 1; aY8>#t?
if (queue[j]>queue[k]) !!dNp5h`
break; }_XKO\
SortUtil.swap(queue,j,k); SyX>zN!
k = j; P}JA"V&
} \)`\F$CF
} L}x"U9'C
=<R77rnY&
} V=.lpj9m
aCy2.Qn
} naM4X@jl
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SortUtil： Vh4z+JOC
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package org.rut.util.algorithm; 1rT}mm/e;
'2v,!G]^
import org.rut.util.algorithm.support.BubbleSort; n%@xnB$ZX
import org.rut.util.algorithm.support.HeapSort; )T 3y,*
import org.rut.util.algorithm.support.ImprovedMergeSort; lv,8NmP5
import org.rut.util.algorithm.support.ImprovedQuickSort; x)nBy)<
import org.rut.util.algorithm.support.InsertSort; lOcvRF
import org.rut.util.algorithm.support.MergeSort; /dBQ*f5
import org.rut.util.algorithm.support.QuickSort; V#C[I~l
import org.rut.util.algorithm.support.SelectionSort; t9W_ [_a9
import org.rut.util.algorithm.support.ShellSort; Vz51=?75
44($a9oa2
/** !j(v-pQf"
* @author treeroot !9OAMHa*9
* @since 2006-2-2 My Af~&Y+
* @version 1.0 ,7k)cNstW
*/ ;]+kC
public class SortUtil { NuW9.6$Jrf
public final static int INSERT = 1; w,9$*=k
public final static int BUBBLE = 2; X62z>mM
public final static int SELECTION = 3; + ECV|mkk
public final static int SHELL = 4; .K;*uq:0
public final static int QUICK = 5; \d%&_rp
public final static int IMPROVED_QUICK = 6; hH`yQGZ
public final static int MERGE = 7; 5H;*Nj@
public final static int IMPROVED_MERGE = 8; <fWho%eOK
public final static int HEAP = 9; /Y%) Y
{#0B~Zr
public static void sort(int[] data) { .lTU[(qwu
sort(data, IMPROVED_QUICK); +TA(crD
} ,Ix7Yg[
private static String[] name={ JKGUg3\~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jpT!di
}; [t,grdw
=}u;>[3
private static Sort[] impl=new Sort[]{ Ui'~d(F
new InsertSort(), ;m{[9i`2
new BubbleSort(), pBh[F5
new SelectionSort(), J6rXbui$
new ShellSort(), :G,GHU'/78
new QuickSort(), H[fD >
new ImprovedQuickSort(), u;J9aKD
new MergeSort(), R~[ u|EC}
new ImprovedMergeSort(), ,|?B5n&
new HeapSort() ^L<1S/~)
}; L&q~5 9
ps_CQh0
public static String toString(int algorithm){ ?r2Im5N
return name[algorithm-1]; I&1h/
} R qOEQ*k
SL>>]A,E<`
public static void sort(int[] data, int algorithm) { >c8zMd
impl[algorithm-1].sort(data); VBBqoyP h
} "?}QwtUW
GVCyVt[!-
public static interface Sort { l?Bv9k.^?
public void sort(int[] data); 3eFD[c%mN
} ir3iW*5k
Jel%1'Dc^
public static void swap(int[] data, int i, int j) { 1h"0B
int temp = data; jQ1~B1(
data = data[j]; ~ m,z|
data[j] = temp; x!]ZVl]
} hRtnO|Z6
} $BkdC'D