[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; *hrd5na
} =Qq+4F)MD
int i1=l; ESs\O?nO
int i2=mid+1; g0H[*"hj
for(int cur=l;cur<=r;cur++){ 8L XHk l
if(i1==mid+1) $>gFf}#C
data[cur]=temp[i2++]; $'TM0Yu,
else if(i2>r) w!CNRtM:~
data[cur]=temp[i1++]; mOSv9w#,
else if(temp[i1] data[cur]=temp[i1++]; 3T 9j@N77
else !k%#R4*>
data[cur]=temp[i2++]; )"LJ hLg
} ijcm2FJcG
} fM}#ON>Z
g0 [w-?f
} "b[5]Y{ U
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改进后的归并排序: e)ZUO_Q$
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package org.rut.util.algorithm.support; 'yth'[
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import org.rut.util.algorithm.SortUtil; >p/`;Kq@
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/** ,[Fb[#Qqb
* @author treeroot S'14hk<
* @since 2006-2-2 m*;ERK
* @version 1.0 "L1Zi.)
*/ p'fYULYE
public class ImprovedMergeSort implements SortUtil.Sort { HDKbF/
r>\bW)e
private static final int THRESHOLD = 10; BHw, 4#F1;
]9XDS[<2`
/* _U0f=m
* (non-Javadoc) eFAnFJ][L
* 6RM/GM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HThcn1u~^b
*/ nm+s{
public void sort(int[] data) { &{RDM~
int[] temp=new int[data.length]; Ah<+y\C
mergeSort(data,temp,0,data.length-1); l@\FWWQ
} \1`O_DF~o
@KA4N`
private void mergeSort(int[] data, int[] temp, int l, int r) { ':}\4j&{E
int i, j, k; $|@ r!/W
int mid = (l + r) / 2; DJ%PWlK5
if (l == r) B:QHwzd
return; i&k7-<
if ((mid - l) >= THRESHOLD) nd(S3rct&
mergeSort(data, temp, l, mid); ~4"dweu?
else m3ff;,
insertSort(data, l, mid - l + 1); bi:8(Q$w:`
if ((r - mid) > THRESHOLD) ~v83pu1!2s
mergeSort(data, temp, mid + 1, r); -F92-jBM4
else _FEFx
insertSort(data, mid + 1, r - mid); rH>)oThA#
v}(WaO#S
for (i = l; i <= mid; i++) { >Se,;cB'/]
temp = data; Gc!x|V;T
} }-fl$j?9E
for (j = 1; j <= r - mid; j++) { I0a<%;JJW
temp[r - j + 1] = data[j + mid]; X?$_Sd"G+5
} QM]YJr3rE
int a = temp[l]; d %#b:(,
int b = temp[r]; y==CTY@
for (i = l, j = r, k = l; k <= r; k++) { fT{Yg /j
if (a < b) { !Uc T RI
data[k] = temp[i++]; pmilrZmm]
a = temp; 0;ji65
} else { ;6wA"
data[k] = temp[j--]; sC;+F*0g
b = temp[j]; 0^ibNiSP
} 6&-(&(_
} Z)\@i=m
} R$Q.sE
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/** #,.Hr#3nI
* @param data ]fD} ^s3G
* @param l Faf&U%]*`
* @param i {GO#.P"
*/ rD>f|kA?L
private void insertSort(int[] data, int start, int len) { X$pJ :M{F$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $\! 7 {6a
} )/EO&F
} TU7'J
} `#gie$B{
} d M-%{
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堆排序： (khL-F
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package org.rut.util.algorithm.support; T n}s*<=V
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import org.rut.util.algorithm.SortUtil; ,{q;;b9
2>H24F
/** PzR[KUK
* @author treeroot N&V`K0FU
* @since 2006-2-2 6i*sm.SDw
* @version 1.0 XGMiW0j0B
*/ D1mfm.9_r^
public class HeapSort implements SortUtil.Sort{ :Lug7bUVD
k: ;WtBC6j
/* (non-Javadoc) Y]5l.SV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yir [!{
*/ ^Va1f'g
public void sort(int[] data) { /^|Dbx!u
MaxHeap h=new MaxHeap(); |B2+{@R
h.init(data); .y,0[i V N
for(int i=0;i h.remove(); IyPnp&_
System.arraycopy(h.queue,1,data,0,data.length); /[>sf[X\I9
} *r% c
V,?yPi$#E
private static class MaxHeap{ m<g~H4
5Zva:
void init(int[] data){ f0aKlhEC
this.queue=new int[data.length+1]; C=4Qlt[`
for(int i=0;i queue[++size]=data; 4X(H;
fixUp(size); 19KQlMO.G
} (/*]?Ehd
} yEj^=pw
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private int size=0; aCLqk'
6qd\)q6T&x
private int[] queue; }XM(:|8J,
q=qcm`ce
public int get() { 9lDhIqx0~
return queue[1]; 5RpjN: 3
} {Fe[:\
y {<9]'
public void remove() { [bNx^VP*
SortUtil.swap(queue,1,size--); M>8A\;"
fixDown(1); B i<Q=x'Z;
} "{Eta
file://fixdown x*&|0n.D
private void fixDown(int k) { 84pFc;<
int j; ye? 'Ze
while ((j = k << 1) <= size) { g]yBA7/S"
if (j < size %26amp;%26amp; queue[j] j++; %O;bAC_M
if (queue[k]>queue[j]) file://不用交换 ;K&o-y
break; &&RimoIeo
SortUtil.swap(queue,j,k); /mu*-,aeX
k = j; pDCeQ6?
} 3az&<Pqb
} PJrtMAcKq
private void fixUp(int k) { a1y-3z
while (k > 1) { cFnDmtI:
int j = k >> 1; z4]api(xZ
if (queue[j]>queue[k]) o\pVpbB
break; c[1oww
SortUtil.swap(queue,j,k); BC<^a )D=
k = j; O,h;hQZ
} -rli(RR)|
} ;^I*J:]
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} hL;(C)(
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} qd)/9*|Jl
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SortUtil： l +OFw)8od
aAMVsE{
package org.rut.util.algorithm; ,+{LYF
$,}E
import org.rut.util.algorithm.support.BubbleSort; 04l!:Tp,
import org.rut.util.algorithm.support.HeapSort; >P@H#=
import org.rut.util.algorithm.support.ImprovedMergeSort; 'd$P`Vw:
import org.rut.util.algorithm.support.ImprovedQuickSort; 0dhaAq`k
import org.rut.util.algorithm.support.InsertSort; #& Rw&
import org.rut.util.algorithm.support.MergeSort; gPsi
import org.rut.util.algorithm.support.QuickSort; m(#LhlX
import org.rut.util.algorithm.support.SelectionSort; >X4u]>X
import org.rut.util.algorithm.support.ShellSort; [^e%@TV>d
:~T99^$zA
/** /%TI??PGu
* @author treeroot gSUcx9f]
* @since 2006-2-2 i?g5_HI
* @version 1.0 z'\_jaj^
*/ i/ )am9
public class SortUtil { $#S&QHyEe
public final static int INSERT = 1; R:k5QD9/&p
public final static int BUBBLE = 2; |>27B
public final static int SELECTION = 3; FrYqaP
public final static int SHELL = 4; D\sWZ
public final static int QUICK = 5; <_tT<5'[$u
public final static int IMPROVED_QUICK = 6; 2Mmz%S'd
public final static int MERGE = 7; sy"^?th}b
public final static int IMPROVED_MERGE = 8; au=o6WRa
public final static int HEAP = 9; }O^zl#
U\;6mK)M^J
public static void sort(int[] data) { Dg?70v<a
sort(data, IMPROVED_QUICK); 3#&7-o
} O6/f5
private static String[] name={ "C SC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -[!P!d=
}; t&CJ%XP
,:H\E|XeBw
private static Sort[] impl=new Sort[]{ L>%o[tS
new InsertSort(), WIf0z#JMJm
new BubbleSort(), Hp|_6hO 2
new SelectionSort(), g,95T Bc
new ShellSort(), pDcjwlA%
new QuickSort(), >wBJy4:
new ImprovedQuickSort(), X+}1
new MergeSort(), @$c\dvO
new ImprovedMergeSort(), FPI;Jx6W'
new HeapSort() mkF"
}; G *;a^]-
>U*T0FL7
public static String toString(int algorithm){ U1RpLkibQ
return name[algorithm-1]; w1"nffhO
} Z->p1xkX
/)(#{i*
public static void sort(int[] data, int algorithm) { 1/-43B
impl[algorithm-1].sort(data); \y)
} Qj6/[mUr~
fKeT~z{~
public static interface Sort { 78OIUNm`
public void sort(int[] data); K7Wk6Aw
} :WL'cJ9a
ugx%_x6
public static void swap(int[] data, int i, int j) { zs*L~_K
int temp = data; '07P&g-
data = data[j]; D{d>5P?W
data[j] = temp; eI:C{0p=
} R&';Oro
} /BV03B