[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; LU2waq}VA
} +%#8k9Y
int i1=l; ;Icixu'O
int i2=mid+1; X6@wkrf-
for(int cur=l;cur<=r;cur++){ !G?gsW0\h
if(i1==mid+1) M+Uyb7
data[cur]=temp[i2++]; %1}6q`:w
else if(i2>r) K-Mc6
data[cur]=temp[i1++]; aMwB>bt
else if(temp[i1] data[cur]=temp[i1++]; 63&^BW
else HlB]38
data[cur]=temp[i2++]; P+(i^=S
} wL{qD
} S~yR5cb
j8$Zv%Ca%
} @;^Y7po6u
8]"(!i_;)
改进后的归并排序: r4{<Z3*N
")UwkF
package org.rut.util.algorithm.support; ~[W#/kd1n
:td ~g;w
import org.rut.util.algorithm.SortUtil; N4{nG,Mo]
-$-8W
/** ~~qWI>.4
* @author treeroot WeJ@xL
* @since 2006-2-2 -Zc![cAlO
* @version 1.0 \caH pof
*/ rT6?!$"%.
public class ImprovedMergeSort implements SortUtil.Sort { MDO$m g
PuCc2'#
private static final int THRESHOLD = 10; wEEn?
WFv!Pbq,
/* L^0v\
* (non-Javadoc) +t!S'|C
* ?S[Y:<R{:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QU5Sy oL[
*/ ,/2LY4` 5
public void sort(int[] data) { 9lzQ\}
int[] temp=new int[data.length]; q{' ~+Nq
mergeSort(data,temp,0,data.length-1); vmZ"o9-{#X
} uO(w1Q"^
&t}?2>:
private void mergeSort(int[] data, int[] temp, int l, int r) { \~DM
int i, j, k; p]gT&[iJ
int mid = (l + r) / 2; :E_a0!'
if (l == r) F4C!CUI
return; veh 5}2
if ((mid - l) >= THRESHOLD) 93Yn`Av;
mergeSort(data, temp, l, mid); SaDA`JmO
else 3YL l;TP_
insertSort(data, l, mid - l + 1); *dsX#Iz
if ((r - mid) > THRESHOLD) 1y5Ex:JVZT
mergeSort(data, temp, mid + 1, r); ,T5u'";
else I0Ia6w9
insertSort(data, mid + 1, r - mid); ?ny=
uh3)0.nR
for (i = l; i <= mid; i++) { S\ ,mR4:
temp = data; 4_=Ja2v8;`
} nWYCh7
for (j = 1; j <= r - mid; j++) { %JL]; 4'
temp[r - j + 1] = data[j + mid]; KtN&,C )lJ
} f@ `*>"
int a = temp[l]; U~f4e7x*O
int b = temp[r]; "VUYh$=[
for (i = l, j = r, k = l; k <= r; k++) { [0@`wZ
if (a < b) { @!%n$>p/V
data[k] = temp[i++]; dF@)M
a = temp; +}kgQ^
} else { k2^a$k}
data[k] = temp[j--]; #/-_1H
b = temp[j]; &1^%Nxu1
} b{Zpux+
} WI[:-cv
} FY'dJY3O
`N87h"
/** 5 t{ja
* @param data MZ4c{@Tg
* @param l a:Q[gF8>
* @param i Z|m`7xeCy
*/ 5Jk<xWKj
private void insertSort(int[] data, int start, int len) { p.K*UP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CXaWgxlK:a
} 9U_ks[Qa
} %&blJ6b
} I["j=r
} Mt>oI SN&d
dJuD|9R
堆排序： JAb6zpP
hf<J \
package org.rut.util.algorithm.support; ~}9PuYaD@
#2p#VQh
import org.rut.util.algorithm.SortUtil; lFG9=Wf
Y%`SHe7M
/** tjnPyaJEl
* @author treeroot Z*!O:/B
* @since 2006-2-2 JgfVRqm
* @version 1.0 &)9{HRP
*/ Djt%r<
public class HeapSort implements SortUtil.Sort{ 3{7T4p.G
TpfZ>d2
/* (non-Javadoc) 7'p8a<x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5]Da{Wmgs
*/ .IrNa>J~
public void sort(int[] data) { 4vZ4/#(x
MaxHeap h=new MaxHeap(); N3A<:%s
h.init(data); 9(_{`2R8
for(int i=0;i h.remove(); #;VA5<M8
System.arraycopy(h.queue,1,data,0,data.length); /Ft:ffR|R
} |i%2%V#
:' #\
private static class MaxHeap{ &Z("D7.G
n{5NNV6
void init(int[] data){ m?CZQq,
this.queue=new int[data.length+1]; 4mYCSu14:`
for(int i=0;i queue[++size]=data; ?8V UOx
fixUp(size); s|yVAt|=
} @tUoD>f
} #Z,E><t
':h =*v8a
private int size=0; Rd&9E
kyYLP"oB=
private int[] queue; 8G^<[`.@j
7{kP}?
public int get() { ht97s
return queue[1]; uXZg1F)
} [3/VCYje
/8ynvhF#
public void remove() { QrYa%D+
SortUtil.swap(queue,1,size--); ^z;JVrW
fixDown(1); R=)55qu
} wD\ZOn_J
file://fixdown Kyg=$^{>G
private void fixDown(int k) { VDF)zA1V
int j; Bik*b)9y2
while ((j = k << 1) <= size) { PH3 >9/H
if (j < size %26amp;%26amp; queue[j] j++; ,?cH"@RJ
if (queue[k]>queue[j]) file://不用交换 Zl/<w(f_
break; *<4Em{rZ5
SortUtil.swap(queue,j,k); q?j|K|%
k = j; c@(&[/q!
} qi[Z,&
} .i"W8~<e
private void fixUp(int k) { Qt>>$3]!!
while (k > 1) { =Ufr^naA
int j = k >> 1; Bn?V9TEoO
if (queue[j]>queue[k]) zU5Hb2a
break; u eb-2[=
SortUtil.swap(queue,j,k); ;^){|9@
k = j; _wDS#t;!M
} 63WS7s"
} L,[;k
TbVn6V'
} < Bg8,;
;T+pu>)
} j+4H}XyE
*Ust[u
SortUtil： KP"%Rm`XN
`_X;.U.Mv
package org.rut.util.algorithm; _`-1aA&n~
F_3:bX
import org.rut.util.algorithm.support.BubbleSort; ?Ke eHMu
import org.rut.util.algorithm.support.HeapSort; wEW4gz{s
import org.rut.util.algorithm.support.ImprovedMergeSort; csZc|kDI
import org.rut.util.algorithm.support.ImprovedQuickSort; Qeq5gN]
import org.rut.util.algorithm.support.InsertSort; x*XH]&V
import org.rut.util.algorithm.support.MergeSort; wE\3$ s/{D
import org.rut.util.algorithm.support.QuickSort; sq/]wzT:
import org.rut.util.algorithm.support.SelectionSort; nR;D#"p%
import org.rut.util.algorithm.support.ShellSort; Ddju~510
LtgXShp_!
/** 2;3f=$3
* @author treeroot Kn;D?ioY
* @since 2006-2-2 &BE g
* @version 1.0 '])2k@o@
*/ O\KQl0*l\\
public class SortUtil { F/c$v
public final static int INSERT = 1; (@0O
public final static int BUBBLE = 2; 'T=~jA7SkT
public final static int SELECTION = 3; E; $+f
public final static int SHELL = 4; :aLT0q!K
public final static int QUICK = 5; 6.1)IQkO
public final static int IMPROVED_QUICK = 6; u"xJjS
public final static int MERGE = 7; K0pac6]
public final static int IMPROVED_MERGE = 8; sM[I4.A3
public final static int HEAP = 9; _6@hTen`
UaG1c%7?X
public static void sort(int[] data) { 3riw1r;Q
sort(data, IMPROVED_QUICK); UYP9c}_,4
} _jU5O;
private static String[] name={ Ter:sge7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zvc`3
}; zSvgKmNY
*u6Y8IL1
private static Sort[] impl=new Sort[]{ (h-*_a}F4
new InsertSort(), ,Tagj`@bHc
new BubbleSort(), oB1>x^
new SelectionSort(), gR^>3n'
new ShellSort(), ~ (On|h
new QuickSort(), LjFqZrH
new ImprovedQuickSort(), t`'iU$:1f
new MergeSort(), 4\ c,)U}
new ImprovedMergeSort(), owpWz6k7
new HeapSort() 3-n19[zk
}; NSAF4e
y&[y=0!
public static String toString(int algorithm){ |!SOG
return name[algorithm-1]; -5l6&Y
} lfsqC};#\
HL3XyP7
public static void sort(int[] data, int algorithm) { /e}#' H
impl[algorithm-1].sort(data); =QJRMF
} DaHZ{T8>d
Pl=]Srw
public static interface Sort { rX7QbAB
public void sort(int[] data); s?Uh|BfB
} r`S< A;
&ZHC-qMRK
public static void swap(int[] data, int i, int j) { )}%O>%
int temp = data; qB]i6*
data = data[j]; /.Nov
data[j] = temp; ,tH5e&=U01
} /2M.~3gQ
} rx"s!y{!-