[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; ?weuq"*a
} Of-8n-
int i1=l; EgRuB@lw76
int i2=mid+1; h(i_'P?
for(int cur=l;cur<=r;cur++){ 8g?2( MT;
if(i1==mid+1) Y}h&dAr
data[cur]=temp[i2++]; F5+!Gb En
else if(i2>r) a :CeI
data[cur]=temp[i1++]; !FQS9SoO9
else if(temp[i1] data[cur]=temp[i1++]; O' Mma5
else dFZh1*1
data[cur]=temp[i2++]; z"*3p8N
} u63Q<P<
} As??_=>4
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} aqgm
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改进后的归并排序: EiS2-Uh*TT
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package org.rut.util.algorithm.support; aNgJm~K0P
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import org.rut.util.algorithm.SortUtil; .PCbGPbk
miV8jaV
/** 5*O]`Q7
* @author treeroot Yez
* @since 2006-2-2 aW#^@||B
* @version 1.0 -h21
*/ qxHsmGV
public class ImprovedMergeSort implements SortUtil.Sort { -3SRGr
;I>77gi`]
private static final int THRESHOLD = 10; d 1 O+qS
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/* 5N907XVu
* (non-Javadoc) GPAz#0p
* 7H. HiyppW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _:Ov-HIR
*/ 0Hr)h{!F"
public void sort(int[] data) { 9abn6S(XpJ
int[] temp=new int[data.length]; LufZ,
mergeSort(data,temp,0,data.length-1); OQ _wsAA
} $KmE9Se6,
u73/#!(1=H
private void mergeSort(int[] data, int[] temp, int l, int r) { V6b)
int i, j, k; Yt;@@xe&
int mid = (l + r) / 2; mZ.E;X& ,*
if (l == r) t`0(5v
return; r]%.,i7~8
if ((mid - l) >= THRESHOLD) 30h1)nQ$h}
mergeSort(data, temp, l, mid); R[2h!.O8
else `4"&_ltD
insertSort(data, l, mid - l + 1); d-"[-+)-
if ((r - mid) > THRESHOLD) u &{|f
mergeSort(data, temp, mid + 1, r); Rp.FG
else )Ju$PrO
insertSort(data, mid + 1, r - mid); cKAZWON8;v
}J:WbIr0!
for (i = l; i <= mid; i++) { 5G#K)s(QC
temp = data; @TnAO8Q>XD
} 0>0:ls
for (j = 1; j <= r - mid; j++) { `pXC= []B2
temp[r - j + 1] = data[j + mid]; BYs^?IfW
} !B&1{
int a = temp[l]; R(HW0@R@w
int b = temp[r]; po+1
for (i = l, j = r, k = l; k <= r; k++) { |y2cI,&
if (a < b) { !n5s/"'H
data[k] = temp[i++]; |Vc:o_n7
a = temp; u=6{P(5$j
} else { :6frx=<
data[k] = temp[j--]; z(beT e
b = temp[j]; h93
} LWP&Si*j
} q8vRUlf
} [>f4&yY
@0rwvyE=+3
/** !O#NP!
* @param data 9rQpKq:# E
* @param l Q"H1(kG|
* @param i |p+ xM
*/ cH$Sk
private void insertSort(int[] data, int start, int len) { D\V (r\i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N%`Eq@5
} "a>a "Ei
} 6b#J!:?
} JY@x.?N5$
} \JEI+A PY*
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堆排序： {~:F1J~=
VUGVIy.
package org.rut.util.algorithm.support; 5>[j^g+@
>a1ovKF
import org.rut.util.algorithm.SortUtil; g,cl|]/\d
h3:dO|Z
/** |CjE}5Op>
* @author treeroot W,)qE^+
* @since 2006-2-2 dKTUW<C
* @version 1.0 p uLQ_MNV
*/ as| MB (
public class HeapSort implements SortUtil.Sort{ eEkbD"Q
RJZ4fl
/* (non-Javadoc) %O3 r>o=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 79Vp^GG7
*/ z|>f*Z
public void sort(int[] data) { KwuNHK)-
MaxHeap h=new MaxHeap(); awa$o
h.init(data); ceqYyVy
for(int i=0;i h.remove(); ,b8q$R~\
System.arraycopy(h.queue,1,data,0,data.length); tvG/oe .1'
} FqK2[]8
ZX!u\O|w
private static class MaxHeap{ L`{EXn[
&O.S ;b*+
void init(int[] data){ v><uHjP
this.queue=new int[data.length+1]; U0W- X9>y
for(int i=0;i queue[++size]=data; *QpKeI
fixUp(size); gRdg3qvU
} 5zH?1Z~*
} O~AOZ^a:2
xN#. Pm~
private int size=0; B]YY[i
$?u ^hMU=
private int[] queue; (S#4y
?(CMm%(8
public int get() { 3#Hx^H
return queue[1]; @rVBL<!o,
} )v67wn*1A
i;$'haK<
public void remove() { *u%4]q
SortUtil.swap(queue,1,size--); ]n:)W.|`R
fixDown(1); r:Xui-
} L?n*b
file://fixdown <ctn_"p Z
private void fixDown(int k) { $dLPvN
int j; If_S_A c
while ((j = k << 1) <= size) { JOIbxU{U_
if (j < size %26amp;%26amp; queue[j] j++; &~7b-foCq
if (queue[k]>queue[j]) file://不用交换 :#QYwb~
break; h4^ a#%$
SortUtil.swap(queue,j,k); zk@KuBLL
k = j; ]l'W=_XDg
} Py8<db%
} |0mVK`
private void fixUp(int k) { X|7Y|0o
while (k > 1) { 5E/z.5 q
int j = k >> 1; `MtPua\_
if (queue[j]>queue[k]) l&4TfzkY
break; rE bC_<
SortUtil.swap(queue,j,k); @M-+-6+
k = j; 2|)3Ly9
} FPu"/4v&
} =,~h]_\_
:,=no>mMx
} v&B*InR?+
/)PD+18
} )vK %LmP
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SortUtil： PQRh5km
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package org.rut.util.algorithm; ~Cj55S+
\gL H_$}
import org.rut.util.algorithm.support.BubbleSort; t,.MtU>K@
import org.rut.util.algorithm.support.HeapSort; $Rsf`*0-
import org.rut.util.algorithm.support.ImprovedMergeSort; hb"t8_--c
import org.rut.util.algorithm.support.ImprovedQuickSort; gC#PqK~
import org.rut.util.algorithm.support.InsertSort; xh\{ dUPA
import org.rut.util.algorithm.support.MergeSort; Y$ ;C@I
import org.rut.util.algorithm.support.QuickSort; ']+-u{+#
import org.rut.util.algorithm.support.SelectionSort; 1Q6WpS
import org.rut.util.algorithm.support.ShellSort; e1X*}OI
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/** }06
* @author treeroot PQsqi;=)
* @since 2006-2-2 J8$G-~MeJ
* @version 1.0 DLkNL?a
*/ $@t-Oor;
public class SortUtil { 31y=Ar""
public final static int INSERT = 1; ubIGs|p2c
public final static int BUBBLE = 2; Cd#>,,\z
public final static int SELECTION = 3; 1@kPl[`p'
public final static int SHELL = 4; jl=<Q.Mm7
public final static int QUICK = 5; JI}(R4uV
public final static int IMPROVED_QUICK = 6; Wr7^
public final static int MERGE = 7; a'ViyTBo
public final static int IMPROVED_MERGE = 8; F t%f"Z
public final static int HEAP = 9; K^k1]!W=
h@T}WZv
public static void sort(int[] data) { 7{:| )
sort(data, IMPROVED_QUICK); RR><so%
} J56+eC(
private static String[] name={ B3'qmi<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z^>[{|lIA
}; m u(HNj
%lchz/
private static Sort[] impl=new Sort[]{ W 0Q-&4
new InsertSort(), WJZW5 Xt
new BubbleSort(), `/<KDd:_t
new SelectionSort(), UcDJ%vI
new ShellSort(), oq=D9
new QuickSort(), ~<3qsA..
new ImprovedQuickSort(), 4em7PmT
new MergeSort(), vfJ}t#%UH
new ImprovedMergeSort(), 8f% @
new HeapSort() =V1k'XJ
}; S'HM|&
O9]j$,i
public static String toString(int algorithm){ _$By c(.c
return name[algorithm-1]; Wy,DA^\ef
} ;"&^ckP
zGu(y@o
public static void sort(int[] data, int algorithm) { gqJ&Q t#f
impl[algorithm-1].sort(data); %FQMB
} FZnkQ
O: sjf?z
public static interface Sort { KGkzE
public void sort(int[] data); 'bkecC
} {SW104nb&#
Lm9y!>1"O
public static void swap(int[] data, int i, int j) { 0X-u'=Bs
int temp = data; er^z:1'
data = data[j]; X",fp
data[j] = temp; >\8Bu#&s4
} tuK"}HepB
} =R!=uml(