[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; w%j 6zsTz
} i#&]{]}Qv
int i1=l; vQYd!DSh
int i2=mid+1; Xy=|qu
for(int cur=l;cur<=r;cur++){ l'?/$?'e_Z
if(i1==mid+1) _8DY9GaE
data[cur]=temp[i2++]; >"N\ZC^
else if(i2>r) 4|7L26,]5
data[cur]=temp[i1++]; 1&U'pp|T
else if(temp[i1] data[cur]=temp[i1++]; rJKX4,M
else DJT)7l{
data[cur]=temp[i2++]; phEM1",4T
} !Kd/ lDY
} 9e1gjC\c
6HFA2~A
} bG;vl;C
l*xA5ObV
改进后的归并排序: u*}6)=+:
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package org.rut.util.algorithm.support; Z9 }qds6 y
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import org.rut.util.algorithm.SortUtil; J1yy6Wq3[
1 NLawi6
/** 5{[3I|m{
* @author treeroot .V 9E@_(
* @since 2006-2-2 !W{|7Es?.
* @version 1.0 |4x&f!%m
*/ c[@>#7p`o
public class ImprovedMergeSort implements SortUtil.Sort { j+PW9>Uh
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private static final int THRESHOLD = 10; fh:=ja?bM3
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/* **dGK_^T0
* (non-Javadoc) mWta B>f
* hFs0qPVY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DV]Kd 7
*/ &%C4rAd2
public void sort(int[] data) { _nOio?
int[] temp=new int[data.length]; !fyE Hk
mergeSort(data,temp,0,data.length-1); ~)Ny8Dh
} JxNjyw
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private void mergeSort(int[] data, int[] temp, int l, int r) { C7eaioW$
int i, j, k; 0 l G\QT
int mid = (l + r) / 2; ^kt#[N
if (l == r) 6@; w%Ea
return; 73Tg{~
if ((mid - l) >= THRESHOLD) O/iew3YF
mergeSort(data, temp, l, mid); Xj?j1R>GB
else %pe7[/
insertSort(data, l, mid - l + 1); 0ot=BlMu
if ((r - mid) > THRESHOLD) {;=+#QK/
mergeSort(data, temp, mid + 1, r); nLJ]tpw^DH
else h:Npi `y
insertSort(data, mid + 1, r - mid); t.485L%
@_h/%>0
for (i = l; i <= mid; i++) { nYTI\f/8v
temp = data; =r:D]?8oC
} H2p1gb#
for (j = 1; j <= r - mid; j++) { %~ZOQ%c1
temp[r - j + 1] = data[j + mid]; S'B7C>i`#N
} C(7LwV
int a = temp[l]; Hg*6I%D[So
int b = temp[r]; `61VP-r
for (i = l, j = r, k = l; k <= r; k++) { M@ ! {m
if (a < b) { (*^_wq-;
data[k] = temp[i++]; / QSK$ZDC
a = temp; 3[-L'!pOX3
} else { ?v8B;="#w
data[k] = temp[j--]; VL7zU->
b = temp[j]; W(a=ev2sa
} oRmN|d ~4
} M I/9?B
} X 4;+`
]ZHC*r2i
/** x]Nq|XK
* @param data Gk'J'9*
* @param l ^h4Q2Mv o
* @param i [ wr0TbtV
*/ Xp4pN{he
private void insertSort(int[] data, int start, int len) { rqT@i(i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #eR*|W7o
} _lu.@IX-
} GriL< =?t
} `cMa Fc-y/
} ^A;v|U
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堆排序： [;h@q}
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package org.rut.util.algorithm.support; q}1AV7$Ai
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import org.rut.util.algorithm.SortUtil; !NZFo S~
oT_k"]~Q~2
/** fL' 42
* @author treeroot y3))I\QT
* @since 2006-2-2 +Y'(,J
* @version 1.0 +c+#InsY
*/ ~~&8I!r e
public class HeapSort implements SortUtil.Sort{ H [R|U
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/* (non-Javadoc) ,d&~#W]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RVlC8uJ;P
*/ MJ4+|riB
public void sort(int[] data) { oypX.nye_
MaxHeap h=new MaxHeap(); ft?J|AG
h.init(data); pV<18CaJ
for(int i=0;i h.remove(); !pQQkZol
System.arraycopy(h.queue,1,data,0,data.length); ppmDmi~X
} QVQe9{ "0
`hY%<L sI
private static class MaxHeap{ %h2U(=/:
1g^N7YF
void init(int[] data){ 87r#;ND
this.queue=new int[data.length+1]; nhiCV>@y
for(int i=0;i queue[++size]=data; G\ru%
fixUp(size); svHs&v
} Ycn*aR2
} n;/yo~RR
)Uo)3FAn
private int size=0; wRi!eN?
-]A,SBs
private int[] queue; GbBcC#0
w)5eD+n\-
public int get() { &,3.V+Sz
return queue[1]; |r%6;8A]i
} cQA;Y!Q#
k`'^e/
public void remove() { [ !].G=8
SortUtil.swap(queue,1,size--); #zZQ@+5zw
fixDown(1); j^Bo0{{
} ?2aglj*"v,
file://fixdown ||0mfb
private void fixDown(int k) { SB:-zQ5
int j; ROW8YTYb
while ((j = k << 1) <= size) { M(jSv
if (j < size %26amp;%26amp; queue[j] j++; [qI, $ +
if (queue[k]>queue[j]) file://不用交换 bmGIxBRq
break; o/)]z
SortUtil.swap(queue,j,k); QZYD;&iY&
k = j; Nd%,V
} > CZ|Vx
} :-69,e
private void fixUp(int k) { 9]xOuCb
while (k > 1) { tF O27z@
int j = k >> 1; wHEt;rc(
if (queue[j]>queue[k]) ![0\m2~iv
break; OLXG0@
SortUtil.swap(queue,j,k); ,1a6u3f,
k = j; 18zv]v %
} dE%rQE7'
} ?WKFDL'_0j
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} =j#uH`jgW
j[F\f>
} LeF Z%y)F
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SortUtil： +A>>Ak|s
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package org.rut.util.algorithm; "fU=W|lY
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import org.rut.util.algorithm.support.BubbleSort; v8I&~_b
import org.rut.util.algorithm.support.HeapSort; |'aGj
import org.rut.util.algorithm.support.ImprovedMergeSort; ~*79rDs{
import org.rut.util.algorithm.support.ImprovedQuickSort; v1oq[+
import org.rut.util.algorithm.support.InsertSort; si.ZTG9m
import org.rut.util.algorithm.support.MergeSort; |~Z.l
import org.rut.util.algorithm.support.QuickSort; )CD4k:bm
import org.rut.util.algorithm.support.SelectionSort; (1^AzE%U+Z
import org.rut.util.algorithm.support.ShellSort; @/9#Z4&d0
W_Z%CBjcT
/** sC(IeGbX
* @author treeroot $^?Mip
* @since 2006-2-2 Y[R veF
* @version 1.0 w/IYQC\v
*/ X3-pj<JLY
public class SortUtil { b8r?Dd"T8
public final static int INSERT = 1; '=Nb`n3%
public final static int BUBBLE = 2; mCb(B48]%X
public final static int SELECTION = 3; %iPWg
public final static int SHELL = 4; FAX|.!US*p
public final static int QUICK = 5; sf<S#;aYqn
public final static int IMPROVED_QUICK = 6; M ~zA
public final static int MERGE = 7; !ow:P8K?
public final static int IMPROVED_MERGE = 8; :k*'MU}
public final static int HEAP = 9; Ub2t7MU
&)zNu
public static void sort(int[] data) { 3CL/9C>
sort(data, IMPROVED_QUICK); C& BRyo
} `*g(_EZsS
private static String[] name={ ,&e0~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w9<<|ZaU
}; xQ+UZc
X ^8@T
private static Sort[] impl=new Sort[]{ ^~9fQJNs
new InsertSort(), BKvX,[R2
new BubbleSort(), aMe]6cWHV>
new SelectionSort(), ]V0V8fU|
new ShellSort(), Z$LWZg
new QuickSort(), dWqKt0uh!
new ImprovedQuickSort(), `<2k.aW4e8
new MergeSort(), Q3[MzIk 4
new ImprovedMergeSort(), =(2y$,6g?
new HeapSort() )S@e&a|
}; +pXYBwH 7Q
|;sL*Vr
public static String toString(int algorithm){ f>!)y-7
return name[algorithm-1]; c<bV3,
} U*(/eEtd-
>HNBTc=~t
public static void sort(int[] data, int algorithm) { Ne#FBRu5
impl[algorithm-1].sort(data); kl%%b"h'
} M15Ce)oB1(
>cU#($X$^
public static interface Sort { nWb*u
public void sort(int[] data); @6h,#8#
} nsn
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public static void swap(int[] data, int i, int j) { ,.DTJ7H+
int temp = data; E:vgG|??
data = data[j]; H1>~,zc>E
data[j] = temp; {*mf Is
} 7+ +Fak
} -Pt.