[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; 8JQ<LrIt9
} qb#V)
int i1=l; _SU,f>
int i2=mid+1; lr)G:I#|
for(int cur=l;cur<=r;cur++){ h#$_<U
if(i1==mid+1) M80}3mgP~
data[cur]=temp[i2++]; y}3 `~a
else if(i2>r) ^!zJf7(+<>
data[cur]=temp[i1++]; ;igEIGR
else if(temp[i1] data[cur]=temp[i1++]; 11nO<WH
else Zw3hp,P]
data[cur]=temp[i2++]; RlG'|xaT
} F(0pru4u
} a,en8+r]
Yj|c+&Ng
} &lOXi?&"
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改进后的归并排序: w*]_FqE
@]}Qh;a~
package org.rut.util.algorithm.support; Udb0&Y1^
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import org.rut.util.algorithm.SortUtil; o.v,n1Nm
s (l+{b &
/** tSw~_s_V
* @author treeroot >2!^ dT^D
* @since 2006-2-2 Dg?Ho2ih
* @version 1.0 @U7U?.p
*/ {EiG23!qV
public class ImprovedMergeSort implements SortUtil.Sort { }WBm%f
{Tjtj@-
private static final int THRESHOLD = 10; *X"F:7
2n"*)3Qj
/* gu~-}
* (non-Javadoc) /i7>&ND.r
* EX[l0]fj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2/a04qA#
*/ 7~Xu71^3s
public void sort(int[] data) { C5W-B8>
int[] temp=new int[data.length]; h0ZW,2?l
mergeSort(data,temp,0,data.length-1); ?Mgt5by
} ]lG_rGw
Au\=ypK
private void mergeSort(int[] data, int[] temp, int l, int r) { {d{WMq$
int i, j, k; am)J'i,
int mid = (l + r) / 2; j$JV(fz
if (l == r) jHUz`.8B
return; :Kt mSY
if ((mid - l) >= THRESHOLD) cqU$gKT
mergeSort(data, temp, l, mid); 1bFEx_
else GtGyY0
insertSort(data, l, mid - l + 1); k_.j%
if ((r - mid) > THRESHOLD) tL|L"t_5x
mergeSort(data, temp, mid + 1, r); n^I|}u\
else MXu+I,y*
insertSort(data, mid + 1, r - mid); NR@SDW
.5$V7t.t$\
for (i = l; i <= mid; i++) { [jG uO%
temp = data; E!oJ0*@
} Xl '\krz
for (j = 1; j <= r - mid; j++) { LXOF{FG
temp[r - j + 1] = data[j + mid]; & t@
} `04Y ;@w
int a = temp[l]; jAK`96+D~b
int b = temp[r]; :5qqu{GL
for (i = l, j = r, k = l; k <= r; k++) { b~N|DKj
if (a < b) { r>D[5B
data[k] = temp[i++]; PhaQ3%
a = temp; fjzr8vU}C
} else { SJY"]7
data[k] = temp[j--]; <=LsloI
b = temp[j]; iJ~iJ'vf
} 8Gzs
} w2mlqy2L
} ::h02,y;1%
9dhFQWz"
/** #)c;i<Q3S
* @param data :X'U`jE
* @param l 6!Ap;O^*
* @param i h;h,dx
*/ (]# JpQ
private void insertSort(int[] data, int start, int len) { "NI>HO.U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GA*Khqdid
} kv FOk
} X+G*Q}5
} {b8Y-
} 97=YFK~*
mf_9O
堆排序： b`%e{99\
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package org.rut.util.algorithm.support; ;`Ch2b1+
6P[O8
import org.rut.util.algorithm.SortUtil; /[|md0,
;$&5I9N
/** 2SCf]&
* @author treeroot {?M*ZRO'
* @since 2006-2-2 Q,+*u%/u
* @version 1.0 Gt*<?
*/ ,'0oj$~S:
public class HeapSort implements SortUtil.Sort{ tfU3 6PR
/3HWP`<x
/* (non-Javadoc) [T&y5"@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UyfIAC$S
*/ ~\(>m=|C:H
public void sort(int[] data) { ~k_zMU-1
MaxHeap h=new MaxHeap(); MnsWB[
h.init(data); :a<TV9?H0
for(int i=0;i h.remove(); %>}7$Y%
System.arraycopy(h.queue,1,data,0,data.length); Z["nY&.sI
} 0a-:x4
PL2Q!i`[o
private static class MaxHeap{ OX`GN#yl
* =N6_
void init(int[] data){ 5/VB'N#7s
this.queue=new int[data.length+1]; nylIP */
for(int i=0;i queue[++size]=data; A>,fG9pR
fixUp(size); dD2e"OIX
} dK`O,[}
} ?26[%%
tTxo:+xg
private int size=0; OehB"[;+
*y@]zNPD
private int[] queue; hLA=7
v=^)`C6Ma
public int get() { -m-WUox4"
return queue[1]; t|XC4:/>T
} by3kfY]4s
x \{jWR%
public void remove() { PH=8'GN
SortUtil.swap(queue,1,size--); #j5^/*XW
fixDown(1); 5?Ao9Q]@
} ~Q\uP(!D
file://fixdown {oC69n:
private void fixDown(int k) { K#yH\fn8
int j; aQuy*\$$
while ((j = k << 1) <= size) { ~x\Q\Cxp
if (j < size %26amp;%26amp; queue[j] j++; mq} #{
if (queue[k]>queue[j]) file://不用交换 <p8y'KAlc
break; K\r=MkA.>
SortUtil.swap(queue,j,k); g9Qxf%}
k = j; nUu|}11(
} , |B\[0p
} &BR?;LD
private void fixUp(int k) { DEp: vlW@
while (k > 1) { 7!r`DZ"yF
int j = k >> 1; `Hu;Gdj=
if (queue[j]>queue[k]) vDb}CQ\
break; pAL-Pl9z
SortUtil.swap(queue,j,k); `-\JjMSQ1
k = j; \Vq;j 1
} `215Llzk;
} 0]W/88ut*u
OH~qJ<
} 'Z}$V*
ps J 1J
} j>M%?Tw
FkkB#Jk4
SortUtil： >QPS0Vx[
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package org.rut.util.algorithm; c9k,Dc
B75SLK:h=
import org.rut.util.algorithm.support.BubbleSort; c9={~
import org.rut.util.algorithm.support.HeapSort; ,g.=vQm:?
import org.rut.util.algorithm.support.ImprovedMergeSort; h2snGN/{Hb
import org.rut.util.algorithm.support.ImprovedQuickSort; t)+dW~g
import org.rut.util.algorithm.support.InsertSort; &(7Io?
import org.rut.util.algorithm.support.MergeSort; zYJxoC{
import org.rut.util.algorithm.support.QuickSort; '^AXUb
import org.rut.util.algorithm.support.SelectionSort; ]d(}b>gR~(
import org.rut.util.algorithm.support.ShellSort; $SgD| 9
p.olXP
/** :.^rWCL2
* @author treeroot 2%H(a)
* @since 2006-2-2 s os&
* @version 1.0 34+}u,=
*/ Fb-TCq1y#
public class SortUtil { >iV(8EgBS
public final static int INSERT = 1; 5eJd$}Lbc
public final static int BUBBLE = 2; 6Z=H>w
public final static int SELECTION = 3; 6.=b^6MV
public final static int SHELL = 4; zD|W3hL2&
public final static int QUICK = 5; 4'*K\Ul).H
public final static int IMPROVED_QUICK = 6; [Xg"B|FD0
public final static int MERGE = 7; ~:Nyv+g,$
public final static int IMPROVED_MERGE = 8; bp_@e0
public final static int HEAP = 9; C I0^eaFs
Czn7,KE8X
public static void sort(int[] data) { 4v$AM8/o
sort(data, IMPROVED_QUICK); g#*N@83C
} aKO@_R,:
private static String[] name={ VVOt%d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n!nv.-n
}; qa6up|xUnn
-t?G8,,
private static Sort[] impl=new Sort[]{ c^%k1pae(
new InsertSort(), ozG:f*{T
new BubbleSort(), eU0-_3gN_
new SelectionSort(), [5-5tipvWp
new ShellSort(), yFqC-t-i
new QuickSort(), gw^+[}U#
new ImprovedQuickSort(), ~E~J*R Ze
new MergeSort(), ^DOcw@Z6HC
new ImprovedMergeSort(), $Tza<nA
new HeapSort() sjGZ ,?%
}; 7\lb+^$
biD7(AK
public static String toString(int algorithm){ f ;JSP
return name[algorithm-1]; RCr:2 Iz
} }rZp(FG@*
g<Xwk2_=g
public static void sort(int[] data, int algorithm) { &rubA
impl[algorithm-1].sort(data); &9>d
} :z7!X.*
:h@:F7N _
public static interface Sort { o6oYJ`PY
public void sort(int[] data); NGu]|p
} AH+J:8k
0Og =H79<
public static void swap(int[] data, int i, int j) { I6_+3}Hm{
int temp = data; xh$[E&2u
data = data[j]; b;vO`
data[j] = temp; z7o59&
} o-_a0j
} -u{:39y{n