[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; e%pohHI
} HdlOGa6C
int i1=l; =U~53Tg
int i2=mid+1; hwUb(pZ
for(int cur=l;cur<=r;cur++){ ,k_ b-/
if(i1==mid+1) |in>`:qk
data[cur]=temp[i2++]; e}5x6t
else if(i2>r) wM[Z 0*K
data[cur]=temp[i1++]; 7R[7M%H
else if(temp[i1] data[cur]=temp[i1++]; JtSwbdN
else =LIb0TZ2
data[cur]=temp[i2++]; IR3SP[K"
} v(Kj6'
} 0= bXL!]
LkHH7Pd@
} 6@lZVM)E
|8{ k,!P'K
改进后的归并排序: v(0ujfSR0
au19Q*r9
package org.rut.util.algorithm.support; G[ns^
7./WS,49
import org.rut.util.algorithm.SortUtil; I/upiqy
aC'6
/** g:~q&b[q6
* @author treeroot @?J7=}bzz
* @since 2006-2-2 kK4+K74B
* @version 1.0 ZYY~A_C
*/ 2V;{@k
public class ImprovedMergeSort implements SortUtil.Sort { R#Yj%$E1
61QA<Wb
private static final int THRESHOLD = 10; A#']e8
,)U%6=o#}
/* z7BFkZ6+
* (non-Javadoc) xX<T5Ls
* |1H9,:*%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n|WSnm,W
*/ O0rvr$.
public void sort(int[] data) { )%p46(]
int[] temp=new int[data.length]; H(Wiy@cJn
mergeSort(data,temp,0,data.length-1); \s)$[pAF
} X!6dg.n5
V%;dTCq
private void mergeSort(int[] data, int[] temp, int l, int r) { lmUCrs37
int i, j, k; 5`&@3 m9/
int mid = (l + r) / 2; 4`o0?_.'
if (l == r) vq9O|E3
return; IDpLf*vSG
if ((mid - l) >= THRESHOLD) @g`|ob]9
mergeSort(data, temp, l, mid); )(.g~Q:
else 8cvSA&l(D
insertSort(data, l, mid - l + 1); 0iC5,
if ((r - mid) > THRESHOLD) 1,zc8>M
mergeSort(data, temp, mid + 1, r); -#;ZZ\fdj
else %L)QTv/
insertSort(data, mid + 1, r - mid); BE&8E\w
*1-0s*T
for (i = l; i <= mid; i++) { 6)=;cc{Vr
temp = data; EJz!#f~
} . WJ
for (j = 1; j <= r - mid; j++) { Q~Nq5[
temp[r - j + 1] = data[j + mid]; +B8oW3v# )
} bUy!hS;s
int a = temp[l]; r91i :
int b = temp[r]; sqF.,A,
for (i = l, j = r, k = l; k <= r; k++) { CD#U`jf
if (a < b) { F@ pf._c
data[k] = temp[i++]; DfGq m-c
a = temp; oPBKPGD
} else { =B+dhZ+#S$
data[k] = temp[j--]; ldU ><xc2
b = temp[j]; `'r~3kP*NT
} +3AX1o%p,#
} 8kd):gZKZ
} HnFH|H<Uf
QA~F
/** L{;Q6_m
* @param data BuAzO>=
* @param l !jEV75
* @param i "p+oi@
*/ iM9k!u FE
private void insertSort(int[] data, int start, int len) { xrY >Or
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T^+K`U
} >e.vUUQ{
} yXtQfR
} E*tT^x)
} 2|1CGHj\
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堆排序： <jFov`^
ZF#lh]
package org.rut.util.algorithm.support; e{4e<hd
d6m&nj
import org.rut.util.algorithm.SortUtil; ??#EG{{
/18fpH|
/** DH$Nz
* @author treeroot K'Wv$[~Dc
* @since 2006-2-2 Z3Ww@&bU
* @version 1.0 .!2 u#A
*/ RvU'8Y?>w
public class HeapSort implements SortUtil.Sort{ DBu8}2R
xf8e"mD
/* (non-Javadoc) 6r%i=z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i8cmT+}>
*/ 'tQp&pj
public void sort(int[] data) { e<A>??h^
MaxHeap h=new MaxHeap(); i-WP#\s
h.init(data); &>Y.$eW_
for(int i=0;i h.remove(); -!T24/l
System.arraycopy(h.queue,1,data,0,data.length); nnu#rtvZp}
} gd%Ho8,T
+g1+,?cU
private static class MaxHeap{ >#T?]5Z'MF
F$|d#ny
void init(int[] data){ 8OS^3JS3"
this.queue=new int[data.length+1]; _\@zq*E
for(int i=0;i queue[++size]=data; U? U3?Y-k`
fixUp(size); X g7xy>{]
} <?;KF2A({
} PRyzvc~
VggSDb
private int size=0; J5f}-W@
KxhWZ3
private int[] queue; vkYiO]y
g^=Ruh+
public int get() { Ya<V@qd
return queue[1]; 4`V&Yqwl
} c&<Ei1
>G[:Q s
public void remove() { I&^hG\D
SortUtil.swap(queue,1,size--); W^;4t3eQf
fixDown(1); gHXvmR"
} )*.rl
file://fixdown YoQQ ,
private void fixDown(int k) { mZ?QtyljT
int j; g>b{hkIXg
while ((j = k << 1) <= size) { Az?^4 1r8
if (j < size %26amp;%26amp; queue[j] j++; VS~+W=5}
if (queue[k]>queue[j]) file://不用交换 ~Kt+j
break; #?>pl.
SortUtil.swap(queue,j,k); cnY}^_
k = j; CqX*.j{
} m("KLp8
} )C0Iy.N-
private void fixUp(int k) { /;y`6WG%2
while (k > 1) { NOAz"m+o
int j = k >> 1; 04Uyr;y
if (queue[j]>queue[k]) 7#N= GN
break; 64'sJc.
SortUtil.swap(queue,j,k); 7^#O{QYol
k = j; j(pe6
} Lo)T
} h]Gvt 5
egWfKL&iy
} Kb/qM}jS
$(yi+v
} rNke&z:%X_
Xoq -
SortUtil： ;<F^&/a|yQ
uaLjHR0
package org.rut.util.algorithm; 8|!"CQJ|H
OzTR#`oey
import org.rut.util.algorithm.support.BubbleSort; ( pCU:'"
import org.rut.util.algorithm.support.HeapSort; ^7:UC\_
import org.rut.util.algorithm.support.ImprovedMergeSort; B'PS-Jr
import org.rut.util.algorithm.support.ImprovedQuickSort; ?2gXF0+~Y2
import org.rut.util.algorithm.support.InsertSort; r. rzU
import org.rut.util.algorithm.support.MergeSort; tp\d:4~R
import org.rut.util.algorithm.support.QuickSort; cwHbm%
import org.rut.util.algorithm.support.SelectionSort; :pvVm>
import org.rut.util.algorithm.support.ShellSort; cI@'Pr4:FJ
f$?`50D"1
/** iDsY5l
* @author treeroot G}dq ft5"
* @since 2006-2-2 &pv*TL8
* @version 1.0 yZmeke)_
*/ U4iVI#f
public class SortUtil { je%y9*V
public final static int INSERT = 1; p~-)6)We?
public final static int BUBBLE = 2; [xdVuL;N
public final static int SELECTION = 3; g`6I,6G
public final static int SHELL = 4; + :b"0pu-H
public final static int QUICK = 5; '+GYw$
public final static int IMPROVED_QUICK = 6; #~r+Z[(,p
public final static int MERGE = 7; IFtaoK
public final static int IMPROVED_MERGE = 8; 9T2y2d!X
public final static int HEAP = 9; x|Ms2.!
xHkxrXqeI
public static void sort(int[] data) { $/E{3aT@F2
sort(data, IMPROVED_QUICK); {3Dm/u%=9|
} 530Kk<%^}8
private static String[] name={ !|J2o8g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" raMtTL+
}; 0OtUb:8LX
c'bh`H4
private static Sort[] impl=new Sort[]{ 7G Jhc
new InsertSort(), 1 a%1C`d
new BubbleSort(), #A< |qd
new SelectionSort(), !H9zd\wc
new ShellSort(), LZJFp@
new QuickSort(), <yw=+hz[u
new ImprovedQuickSort(), ,GtN6?
new MergeSort(), JUq7R%"h6
new ImprovedMergeSort(), +N|t:8qaf
new HeapSort() ndvt $*
}; AFsYP/g]
MJn=
public static String toString(int algorithm){ NMN&mJsmh
return name[algorithm-1]; 2Fbg"de3-
} ~KxK+6[ :
0p*Oxsy
public static void sort(int[] data, int algorithm) { w)>/fG|;
impl[algorithm-1].sort(data); $WQm"WAKe
} HoZsDs.XZ
x*:"G'zT
public static interface Sort { u*T#? W?
public void sort(int[] data); <.lt?!.ZH
} :4Y5
R{9G$b1Due
public static void swap(int[] data, int i, int j) { ?:7$c
int temp = data; OHH\sA
data = data[j]; <CS,v)4,nH
data[j] = temp; YgQb(umK
} y@ c[S;
} tR?)C=4,