[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; iD+Q\l;%
} b3N>RPsHS
int i1=l; =Bo(*%
int i2=mid+1; 6C@,&2<yK
for(int cur=l;cur<=r;cur++){ g N76
if(i1==mid+1) Jy?s'tc
data[cur]=temp[i2++]; K-(k6<h
else if(i2>r) ,6:ya8vB
data[cur]=temp[i1++]; (yIl]ZN*
else if(temp[i1] data[cur]=temp[i1++]; $o"Szy
else W}p>jP}
data[cur]=temp[i2++]; 1^ZQXUzl%i
} (oO*|\9u
} ImO\X`{
3on]#/"1b
} )X2=x^u*U
u~FXO[b
改进后的归并排序: rt)70=
&^$dHr6v
package org.rut.util.algorithm.support; aTF~rAne<
t<s:ut)Q!
import org.rut.util.algorithm.SortUtil; zBD ?O!
N)|mA)S)
/** L1ZhH3}X
* @author treeroot n*~=O'
* @since 2006-2-2 W<C \g~\
* @version 1.0 pi7Fd\A
*/ rKEi1b
public class ImprovedMergeSort implements SortUtil.Sort { +>mbBu!7
Lsv[@Rl
private static final int THRESHOLD = 10; 3;(;'5|Z
?n<b:oO
/* I:l<t*
* (non-Javadoc) T[*1*303
* Z ?`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qz/o-W;
*/ yx?Z&9z <
public void sort(int[] data) { "\M16N
int[] temp=new int[data.length]; 'lNy&
mergeSort(data,temp,0,data.length-1); 7.)e4
} !dQG 5v
YCZl1ry:V=
private void mergeSort(int[] data, int[] temp, int l, int r) { cr Hd$~q,
int i, j, k; o&}!bq]
int mid = (l + r) / 2; q8%T)$!
if (l == r) )HbsUm#
return; G;:n*_QXE
if ((mid - l) >= THRESHOLD) Si#I^aF`%
mergeSort(data, temp, l, mid); FG]xn(E
else N"Y)
insertSort(data, l, mid - l + 1); =>nrU8x
if ((r - mid) > THRESHOLD) ??eSGQ|
mergeSort(data, temp, mid + 1, r); "`]G>,r_
else ) *Mr{`
insertSort(data, mid + 1, r - mid); |hms'n0
Ks 8
for (i = l; i <= mid; i++) { G?D7R/0)
temp = data; NFq&a i
} z%-Yz-G9
for (j = 1; j <= r - mid; j++) { KP{|xQ>
temp[r - j + 1] = data[j + mid]; Pf&\2_H3s9
} |"h# Q[3
int a = temp[l]; 3aIP^I1
int b = temp[r]; vf6_oX<Os
for (i = l, j = r, k = l; k <= r; k++) { |hBX"
if (a < b) { KW.*LoO
data[k] = temp[i++]; v5STe`
a = temp; 9}p>='
} else { .?{rd3[ec
data[k] = temp[j--]; lnuf_;0
b = temp[j]; bH4'j/3
} hu}`,2
} OUCLtn\
} zUX%$N+w}>
(B|4wR\
/** 4CA(` _i~
* @param data '.Iz*%"
* @param l k"_i7
* @param i :lj1[q:Y>
*/ Y_m/? [:
private void insertSort(int[] data, int start, int len) { A&EVzmj-+X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >iD&n4TK
} egQB!%D
} W4n;U-Hb
} {A2EGUmF2
} Bk,:a,
Co[fq3iX#
堆排序： .B2?%2S
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package org.rut.util.algorithm.support; %:i; eUKR
2fZVBj
import org.rut.util.algorithm.SortUtil; e8T#ZWr*
o!:V=F
/** >YP6/w,e
* @author treeroot I(LBc
* @since 2006-2-2 h| q!Qsnj'
* @version 1.0 w`_cmI
*/ K_/-mwA v
public class HeapSort implements SortUtil.Sort{ P$LHsg]
o,o,(sII
/* (non-Javadoc) 9G njJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hP1}Do
*/ 1aEM&=h_W
public void sort(int[] data) { *sNZ.Y:.
MaxHeap h=new MaxHeap(); yB][ 3?lv
h.init(data); [:M:6JJ
for(int i=0;i h.remove(); UcaLi&
System.arraycopy(h.queue,1,data,0,data.length); qKoD*cl)Za
} Uc oVp}vl
kLc}a5;
private static class MaxHeap{ YrlOvXW
"^sh:{
void init(int[] data){ }dnO7K
this.queue=new int[data.length+1]; CeL`T:]r
for(int i=0;i queue[++size]=data; _X ?W)]:
fixUp(size); Td!@i[6%H
} kb"g
} b{T". @b
b4TZnO
private int size=0; qg521o$*
$ = uz
private int[] queue; b6KO_s:'g
SvR:tyF
public int get() { _H[LUl9
return queue[1]; ,3 !D(&
} )6K Q"*
p)_v.D3i
public void remove() { l#40VHa?S
SortUtil.swap(queue,1,size--); P-B3<~*i!
fixDown(1); ;F>$\"aG
} %x$1g)
file://fixdown "J51\8G@@
private void fixDown(int k) { ly,3,ok
int j; UO3QwZ4j;
while ((j = k << 1) <= size) { +Fn^@/?yC
if (j < size %26amp;%26amp; queue[j] j++; "9mVBa|Q
if (queue[k]>queue[j]) file://不用交换 ]IX6>p,
break; Ql~9a [8T~
SortUtil.swap(queue,j,k); oW0A8_|9
k = j; |>w>}w`~
} cJb.@8^J
} 8:W,""
private void fixUp(int k) { ;ZnSWIF2
while (k > 1) { &yu3nA:7D
int j = k >> 1; _hM #*?}v
if (queue[j]>queue[k]) .I~#o$6
break; ZkbaUIQ
SortUtil.swap(queue,j,k); Gk"o/]Sf
k = j; K7G|cZ/^
} >F@qFPN]
} (~C_zG
c!,&]*h"k
} R^_7B(
q> ;u'3}
} PvmmyF
}b$?t7Q)
SortUtil： e_eNtVq
@UbH;m
package org.rut.util.algorithm; z ^e99dz
`2}Frw+?
import org.rut.util.algorithm.support.BubbleSort; fW/G_
import org.rut.util.algorithm.support.HeapSort; ixK&E#
import org.rut.util.algorithm.support.ImprovedMergeSort; XUI9)Ne
import org.rut.util.algorithm.support.ImprovedQuickSort; $-HP5Kj(k-
import org.rut.util.algorithm.support.InsertSort; F0yvV6;
import org.rut.util.algorithm.support.MergeSort; g43j-[j)
import org.rut.util.algorithm.support.QuickSort; ,tt .oF|
import org.rut.util.algorithm.support.SelectionSort; 5m.{ayE
import org.rut.util.algorithm.support.ShellSort; N^G $:GC
+I>u${sVx*
/** uc.dtq!
* @author treeroot U[4Xo&`
* @since 2006-2-2 ll]MBq
* @version 1.0 KKrLF?rc
*/ Z%h _g-C
public class SortUtil { [ " n+2;
public final static int INSERT = 1; u%TZ),ny-
public final static int BUBBLE = 2; <F>^ffwGH-
public final static int SELECTION = 3; Iq76JJuCb
public final static int SHELL = 4; hW^*b:v{
public final static int QUICK = 5; YY!Lv:.7>
public final static int IMPROVED_QUICK = 6; [r[IWy(}
public final static int MERGE = 7; .f1
public final static int IMPROVED_MERGE = 8; }OQaQf9V{
public final static int HEAP = 9; U9?fUS
% oPt],>
public static void sort(int[] data) { {P'_s]B)
sort(data, IMPROVED_QUICK); 5y 9(<}z
} A*1-2
private static String[] name={ /G{;?R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {B!LhvYAH
}; H@+1I?l
*En29N#a{
private static Sort[] impl=new Sort[]{ 7H$I9e
new InsertSort(), [uJfmrEH
new BubbleSort(), 6MewQ{hi
new SelectionSort(), fGeDygV^`
new ShellSort(), JJIlR{WY_
new QuickSort(), E{LLxGAEZ
new ImprovedQuickSort(), oFO)28Btv
new MergeSort(), r JvtE}x1
new ImprovedMergeSort(), \wJ2>Q
new HeapSort() iMT[sb
}; "aU) [
fwkklg^
public static String toString(int algorithm){ A`'k5uG
return name[algorithm-1]; $#ve^.VHv
} -Kas9\VWEw
:4Gc'bR
public static void sort(int[] data, int algorithm) { qjcPJ
impl[algorithm-1].sort(data); @r.w+E=
} n7|8`?R^
j_(DH2D
public static interface Sort { &["s/!O1R
public void sort(int[] data); }?\8%hK"a7
} t!=qt*
<Ny DrO"C3
public static void swap(int[] data, int i, int j) { +:IwP
int temp = data; p\'0m0*
data = data[j]; Qkvg85
data[j] = temp; J]!&E~Y
} VW$a(G_h
} Gu#Vc.e