[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; J{mP5<8>b
} DJE/u qE
int i1=l; a{h(BI^~
int i2=mid+1; #^Dc:1,
for(int cur=l;cur<=r;cur++){ SPV'0* Z
if(i1==mid+1) j8os6I
data[cur]=temp[i2++]; ~MY(6P
else if(i2>r) cLlfncI
data[cur]=temp[i1++]; s\&_Kbw]c
else if(temp[i1] data[cur]=temp[i1++]; Q;P~'
else &,Q{l$`X
data[cur]=temp[i2++]; fBH&AO$Q
} skcMGEB
} x 0
&1Fcwj
} EGwY|+3
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改进后的归并排序: .;tO;j|6
yj$S?B Ee
package org.rut.util.algorithm.support; p _e-u-
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import org.rut.util.algorithm.SortUtil; `OQ&u
+&\TdvNI4
/** l@*/1O)v
* @author treeroot J'O`3!Oy/
* @since 2006-2-2 [6S"iNiyKT
* @version 1.0 =X X_Cnn
*/ V8Q#%#)FHe
public class ImprovedMergeSort implements SortUtil.Sort { 5?kA)!|UB
Wsz='@XvB
private static final int THRESHOLD = 10; <J-OwO a-1
16N8h]l
/* _3p:q.
* (non-Javadoc) l``1^&K
* @\l> <R9V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Re1@2a>
*/ -e(2?Xq9
public void sort(int[] data) { /&j4IlT
int[] temp=new int[data.length]; , m|9L{
mergeSort(data,temp,0,data.length-1); ,.FTw,<
} &up/`8
0D#!!r ;
private void mergeSort(int[] data, int[] temp, int l, int r) { @@|E1'c7
int i, j, k; s*CKFEb#
int mid = (l + r) / 2; )+t5G>yKK
if (l == r) :=L[kzX
return; !P Gow
if ((mid - l) >= THRESHOLD) H5RHA^p|
mergeSort(data, temp, l, mid); Y)u}+Yg
else SbnVU[
insertSort(data, l, mid - l + 1); 3}:pD]`h
if ((r - mid) > THRESHOLD) e3>Re![_.
mergeSort(data, temp, mid + 1, r); -N\{QX1Yd
else K[sM)_I
insertSort(data, mid + 1, r - mid); ?XOeMI
T%a]3
for (i = l; i <= mid; i++) { j|G-9E
temp = data; deTbvl
} gy =`cMS@
for (j = 1; j <= r - mid; j++) { "(efd~.]
temp[r - j + 1] = data[j + mid]; |I\A0aa
} 18A&[6"!
int a = temp[l]; A[ iPs9
int b = temp[r]; pO+1?c43
for (i = l, j = r, k = l; k <= r; k++) { 2FVKgyV
if (a < b) { h5F'eur
data[k] = temp[i++]; }ZmdX^xB
a = temp; Y|VzeJC
} else { 1M;)$m:
data[k] = temp[j--]; .sG,TLE[<
b = temp[j]; ONjc},_
} O[L8(+Sn
} '6 'XBL?
} {hg$?4IyQ
c&Zm>Qo[
/** Wq9s[)F"Z
* @param data ?^ErrlI_
* @param l #P9VX5Tg
* @param i !F<?he<U
*/ Awh"SUOh0
private void insertSort(int[] data, int start, int len) { @E>^\!nH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %9D@W*Z
} /3TorB~Y
} I@S<D"af
} xRY5[=97
} \QMSka>
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堆排序： blN1Q%m6
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package org.rut.util.algorithm.support; .4Ny4CMHZ
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import org.rut.util.algorithm.SortUtil; 1I+5
:> q?s
/** j d81E
* @author treeroot W_ 6Jl5]
* @since 2006-2-2 5?fk;Q9+\
* @version 1.0 >@L HJ61C
*/ a2rv4d=
public class HeapSort implements SortUtil.Sort{ #`fT%'T!
|@g1|OWd|
/* (non-Javadoc) _[phs06A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eLYFd,?9
*/ YQ)m?=+J
public void sort(int[] data) { i@J,u
MaxHeap h=new MaxHeap(); \O:xw-eG
h.init(data); \S<5b&G
for(int i=0;i h.remove(); O+8`.
System.arraycopy(h.queue,1,data,0,data.length); +i>q;=~
} @ubz?5
\fz j fZ1n
private static class MaxHeap{ 5VTbW
[]]3"n
void init(int[] data){ @ tIB'|O
this.queue=new int[data.length+1]; `@eH4}L*
for(int i=0;i queue[++size]=data; ( 7?%Hg
fixUp(size); fA8+SaXW%
} Fq9[:
} 9vbh5xX
"P{&UwMmh
private int size=0; u .2sB6}
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private int[] queue; 'MUrszOO.e
qc6IH9i`
public int get() { %yMzgk[u
return queue[1]; `-H:j:U{
} YzZF^q^I
.HBvs=i
public void remove() { (6BCFl:/Q<
SortUtil.swap(queue,1,size--); Vd0GTpB?1
fixDown(1); qj6`nbZ{va
} t4IJ%#22
file://fixdown =vc5,
private void fixDown(int k) { '/H(,TM
int j; AVr!e
while ((j = k << 1) <= size) { jVINc=o
if (j < size %26amp;%26amp; queue[j] j++; K*Jtyy}r
if (queue[k]>queue[j]) file://不用交换 K|G$s
break; ja;5:=8A5
SortUtil.swap(queue,j,k); Vi#im`@
k = j; >>$|,Q-.
} [tzSr=,Cg
} {K9E% ,w
private void fixUp(int k) { c Vn+~m_%
while (k > 1) { V)2_T!e%*
int j = k >> 1; =b7&(x
if (queue[j]>queue[k]) dNQSbp
break; vy@Lu cB
SortUtil.swap(queue,j,k); pD#"8h
k = j; doc
} yU|ji?)e
} uB1!*S1f
MI(i%$R-A
} 5G!U'.gr
f4S@lyYF
} {{3H\ rR
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SortUtil： C):d9OI?
y^=oYL
package org.rut.util.algorithm; *?D2gaCta
3~</lAm;
import org.rut.util.algorithm.support.BubbleSort; %5*#c*)R
import org.rut.util.algorithm.support.HeapSort; > bF!Y]H
import org.rut.util.algorithm.support.ImprovedMergeSort; <S$21NtM87
import org.rut.util.algorithm.support.ImprovedQuickSort; JJ?ri,
import org.rut.util.algorithm.support.InsertSort; d&bc>Vt
import org.rut.util.algorithm.support.MergeSort; Z]TVH8%|k
import org.rut.util.algorithm.support.QuickSort; ]7t\%_
import org.rut.util.algorithm.support.SelectionSort; z4641q5'm
import org.rut.util.algorithm.support.ShellSort; 6B/"M-YME
d;SRK @
/** %-/:ps
* @author treeroot t4/eB<fP
* @since 2006-2-2 _-\s[p5
* @version 1.0 ZPsY0IzLo
*/ ?0NSjK5ma
public class SortUtil { 9yo[T(8
public final static int INSERT = 1; %"Q!5qH&
public final static int BUBBLE = 2; iwJ-<v_:h
public final static int SELECTION = 3; ,R}KcZG)
public final static int SHELL = 4; "IG$VjgcB
public final static int QUICK = 5; wmE,k1G
public final static int IMPROVED_QUICK = 6; R0mT/h2
public final static int MERGE = 7; M5kHD]b
public final static int IMPROVED_MERGE = 8; 9!HMQ
public final static int HEAP = 9; .eNwC.8i
s66XdM
public static void sort(int[] data) { ~cBc&u:"
sort(data, IMPROVED_QUICK); Z034wn\N
} R%_H\-wo
private static String[] name={ &NjZD4m`=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b*F~%K^i$
}; ~|{)h^]@
Vfm #UvA
private static Sort[] impl=new Sort[]{ Jf<yTAm
new InsertSort(), "!Oh#Vf
new BubbleSort(), DUKmwKM"k
new SelectionSort(), yr9A0F0
new ShellSort(), |C6(0fgWd
new QuickSort(), ICbdKgLz
new ImprovedQuickSort(), Zmbz-##HQ
new MergeSort(), $t# ,'M
new ImprovedMergeSort(), XjZao<?u
new HeapSort() BMWeD
}; B"8JFf}"q
X,EYa>RSy_
public static String toString(int algorithm){ a/<pf\O
return name[algorithm-1]; csX*XiDWm
} gQd=0"MV
8+|V!q
public static void sort(int[] data, int algorithm) { p5;,/ |Ft
impl[algorithm-1].sort(data); w+9C/U;|s
} J=SB/8tQ)T
a-A+.7
public static interface Sort { cw]>a&d
public void sort(int[] data); K'5sn|)
} mz$Wo *FB
=R;1vUio
public static void swap(int[] data, int i, int j) { [{p?BTs
int temp = data; -)a_ub
data = data[j]; 8pL>wL &C
data[j] = temp; Ky9No"o
} XBWSO@M'
} O4d^ig-xaH