[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; X%S?o
} pNI=HHx
int i1=l; pVPCxP
int i2=mid+1; {cKKTDN
for(int cur=l;cur<=r;cur++){ s&!g )
if(i1==mid+1) zD-.bHo>.
data[cur]=temp[i2++]; 50Co/-)j
else if(i2>r) =g$%.
data[cur]=temp[i1++]; 9#.nNv*z3
else if(temp[i1] data[cur]=temp[i1++]; 6<R!`N 6
else ]7-*1kL8=~
data[cur]=temp[i2++]; ^6|Q$]}Ok
} =ex71qj)
} NS;,(v{*N
X[}5hZcX
} uG2Hzav
O[;>Y'zqC%
改进后的归并排序: uJm9h(xq
a}+|2k_
package org.rut.util.algorithm.support; soXeHjNl
x\GCsVy
import org.rut.util.algorithm.SortUtil; f 6Bx>lh
; 7[5%xM
/** +hRAU@RA
* @author treeroot *obBo6!zM
* @since 2006-2-2 gyJ$Jp
* @version 1.0 &mKtW$K` q
*/ EV z>#GC
public class ImprovedMergeSort implements SortUtil.Sort { 3Qfj=; 4
4WZ:zr N
private static final int THRESHOLD = 10; 1pVagLlb:7
_JiB=<Fkr
/* 'q8T*|/
* (non-Javadoc) kb]PWOz
* CYmwT>P+*4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2}[)y\`t3
*/ l_y:IY$"
public void sort(int[] data) { (qnzz!s
int[] temp=new int[data.length]; #)2'I`_E
mergeSort(data,temp,0,data.length-1); lW1Al>dW<
} Mk7,:S
0$%:zHi5g
private void mergeSort(int[] data, int[] temp, int l, int r) { dQQh$*IL?{
int i, j, k; (2Z-NVU#
int mid = (l + r) / 2; VlXUrJ9&
if (l == r) fa;\4#
return; t{| KL<d]
if ((mid - l) >= THRESHOLD) 7/w)^&8
mergeSort(data, temp, l, mid); c=K .|g,
else U@!e&QPn
insertSort(data, l, mid - l + 1); +LCpE$H
if ((r - mid) > THRESHOLD) nc!P !M
mergeSort(data, temp, mid + 1, r); Wqy|Y*$qT
else L]3 V)`}
insertSort(data, mid + 1, r - mid); ] hGU.C"(
u;GS[E4
for (i = l; i <= mid; i++) { i<l_z&
temp = data; [O>}%
} j{U?kW{o
for (j = 1; j <= r - mid; j++) { 9`81br+~
temp[r - j + 1] = data[j + mid]; R$IxR=hMx
} '.r_6X$7Jt
int a = temp[l]; <spVUp
int b = temp[r]; A'HFpsa
for (i = l, j = r, k = l; k <= r; k++) { L}pMjyM
if (a < b) { K>hQls+
data[k] = temp[i++]; ]*|+06
a = temp; (B{`In8G>y
} else { \C $LjSS-
data[k] = temp[j--]; oOlqlv
b = temp[j]; _]@
} NKd}g
} I !=ew |
} X?&(i s
U1}-]^\
/** +Kw:z?
* @param data ?55t0
* @param l :sAb'6u1EU
* @param i gQMcQV]C$
*/ ^<49NUB>
private void insertSort(int[] data, int start, int len) { FD:3;nUY7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M?l/_!QB
} Fcz7
} 4u- mE
} #m=TK7*v
} vVQwuV
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堆排序： r#rL~Rsd}
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package org.rut.util.algorithm.support; P0VXHE1p
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import org.rut.util.algorithm.SortUtil; *;cvG?V
:}'5'oVG
/** vqO d`_)
* @author treeroot DSjEoWj
* @since 2006-2-2 X5@+M!`
* @version 1.0 |Hx#Uk#
*/ SO @d\H
public class HeapSort implements SortUtil.Sort{ n@|5PI"bx
5My4a9
/* (non-Javadoc) M3 MB{cA2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Iv])s
*/ }7?_>
public void sort(int[] data) { 6G.(o
MaxHeap h=new MaxHeap(); C.qNBl*
h.init(data); 'D_a2xo0
for(int i=0;i h.remove(); =rz7x
System.arraycopy(h.queue,1,data,0,data.length); :%G_<VAo!
} o;#:%
lTb4quf8I
private static class MaxHeap{ ymH>] cUm
m1bkY#\ U|
void init(int[] data){ [g)HoR=&
this.queue=new int[data.length+1]; y7pwYRY
for(int i=0;i queue[++size]=data; Z~R7 G
fixUp(size); 'Ur1I"
} [$\KS_,Mn
} B&:9uPRzZ
WH|TdU$V
private int size=0; %Q,6sH#
3.?G,%S5.$
private int[] queue; `/ <y0H
Sc b'
public int get() { Wo)$*?
return queue[1]; J9aqmQj('
} 0'wchy>
+_E^E
public void remove() { ^!&6z4DP
SortUtil.swap(queue,1,size--); 3CL1Z\8To
fixDown(1); XLHi
} pLYLHS`*
file://fixdown |D*a"*1+A
private void fixDown(int k) { wrP3:!=
int j; mVXwU](N
while ((j = k << 1) <= size) { M./1.k&@
if (j < size %26amp;%26amp; queue[j] j++; /{6&99SJcc
if (queue[k]>queue[j]) file://不用交换 &t)$5\r
break; jVlXB6[-
SortUtil.swap(queue,j,k); ,~Y[XazT
k = j; ]@Z[/z%~04
} r:{;HM+
} oYx4+xH/
private void fixUp(int k) { Ml,~@} p
while (k > 1) { --OAsbr
int j = k >> 1; ^8.s"4{
if (queue[j]>queue[k]) h`i*~${yg
break; *.us IH2
SortUtil.swap(queue,j,k); ;t~Y>,
k = j; "2 \},o9
} pTB1I3=.u
} , wXixf2
H0(.p'eN
} ^O0trM>h-
@`mr|-Rp@
} J]W? Vvv
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SortUtil： !LR9}Xon
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package org.rut.util.algorithm; ~"J7=u1o
kxQ al
import org.rut.util.algorithm.support.BubbleSort; ?_-5W9
import org.rut.util.algorithm.support.HeapSort; sA~Ijg"6
import org.rut.util.algorithm.support.ImprovedMergeSort; D`'h8:\
import org.rut.util.algorithm.support.ImprovedQuickSort; .(^%M 2:6
import org.rut.util.algorithm.support.InsertSort; vRkVPkZ6|
import org.rut.util.algorithm.support.MergeSort; V~#8lu7;
import org.rut.util.algorithm.support.QuickSort; Tuz~T _M
import org.rut.util.algorithm.support.SelectionSort; f_|pl^
import org.rut.util.algorithm.support.ShellSort; h3e %(a
%OJ"@6A
/** DX0#q#
* @author treeroot b.q/? Yx
* @since 2006-2-2 {K N7Y"AI
* @version 1.0 q#6|/R*
*/ t/lQSUip
public class SortUtil { -{2Vz[[
public final static int INSERT = 1; XqLR2d
public final static int BUBBLE = 2; ,UYe OM2Ao
public final static int SELECTION = 3; h[bC#(
public final static int SHELL = 4; 3mQ3mV:
public final static int QUICK = 5; h e=A%s
public final static int IMPROVED_QUICK = 6; [jz@d\k$_
public final static int MERGE = 7; HQZJK82
public final static int IMPROVED_MERGE = 8; wZ5k|5KtW
public final static int HEAP = 9; HCKocL/]h
_BEDQb{"|
public static void sort(int[] data) { Py`7)S
sort(data, IMPROVED_QUICK); |Ed?s
} C%#w1k
private static String[] name={ #/"Tb^c9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C>Q|"Vf2
}; %H[~V f?d
e/uLBZ
private static Sort[] impl=new Sort[]{ }#q0K
new InsertSort(), DzbcLg%:W
new BubbleSort(), `z^50Vh|
new SelectionSort(), hwQrmVwvP
new ShellSort(), mGpBj9jr1
new QuickSort(), s"`Oj5
new ImprovedQuickSort(), (zPsA
new MergeSort(), _b`/QSL
new ImprovedMergeSort(), "r=p/"4D
new HeapSort() J8B0H1
}; DaBy<pGb?
ol1J1Zg
public static String toString(int algorithm){ x*!*2{
return name[algorithm-1]; ai<K6)
} 33ZHrZ
QFB2,k6jN
public static void sort(int[] data, int algorithm) { _VB;fH$
impl[algorithm-1].sort(data); 4~AY: ib|
} >uo=0=9=
KBoW(OP4'
public static interface Sort { =)#<u9 qqL
public void sort(int[] data); Z6zLL
} [x%8l,O #l
eNK6=D|
public static void swap(int[] data, int i, int j) { y(*5qa<>
int temp = data; {`Z=LLL
data = data[j]; HqI[]T@
data[j] = temp; 9e7):ZupO
} 8lyNg w1
} FzOlM-)m