[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; p1^k4G
} X@`kuWIUw
int i1=l; 8:s" ^YLN
int i2=mid+1; mc37Y.
for(int cur=l;cur<=r;cur++){ b3Nr>(Z<}
if(i1==mid+1) 6XU1w
data[cur]=temp[i2++]; 8JYF0r7
else if(i2>r) \Eqxmo
data[cur]=temp[i1++]; %C}TdG(C
else if(temp[i1] data[cur]=temp[i1++]; b|_Pt
else VsLlPw{
data[cur]=temp[i2++]; Z1u:OI@(
} h,QC#Ak o
} *2wFLh
o\ss
} s'/b&Idf8
#bk[Zj&
改进后的归并排序: k4WUfL d
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package org.rut.util.algorithm.support; a W1y0
L#)F00/`
import org.rut.util.algorithm.SortUtil; u!wR
9a4Xf%!F>z
/** doeYc
* @author treeroot Ci{,e%
* @since 2006-2-2 -1^dOG6*
* @version 1.0 dS9L(&
*/ YXeL7W
public class ImprovedMergeSort implements SortUtil.Sort { EtVRnI@
M3>c?,O)J
private static final int THRESHOLD = 10; ]r6S|;:
R`%C]uG
/* DK-V3}`q}
* (non-Javadoc) e}V3dC^pU
* >SS YYy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NFDh!HUm
*/ p%MH**A
public void sort(int[] data) { /"$A?}V
int[] temp=new int[data.length]; ?"23XKe
mergeSort(data,temp,0,data.length-1); PDwi])6mf
} E RnuM
!aylrJJ
private void mergeSort(int[] data, int[] temp, int l, int r) { u7L!&/6On
int i, j, k; >\J({/ #O
int mid = (l + r) / 2; J-Xw}|>@
if (l == r) QPL6cU$&R
return; d"h*yH@
if ((mid - l) >= THRESHOLD) CJ'pZ]\G
mergeSort(data, temp, l, mid); i6)7)^nG
else .&|Ivz6
insertSort(data, l, mid - l + 1); Id_?
if ((r - mid) > THRESHOLD) jS_fwuM
mergeSort(data, temp, mid + 1, r); *CsRO
else bU3e*Er
insertSort(data, mid + 1, r - mid); (~}P.?C8
cu)ssT
for (i = l; i <= mid; i++) { os<YfMM<:/
temp = data; /E(319u_
} @(k}q3b<
for (j = 1; j <= r - mid; j++) { 2@&|/O6_\h
temp[r - j + 1] = data[j + mid]; RXo!K iQO
} a?635*9K
int a = temp[l]; fV}:eEo|Y
int b = temp[r]; }F v:g!
for (i = l, j = r, k = l; k <= r; k++) { 4$HU=]b6Tf
if (a < b) { ~3,>TV
data[k] = temp[i++]; .TI=3*`G
a = temp; 8oAr<:.=
} else { $>Y2N5
data[k] = temp[j--]; u1@&o9
b = temp[j]; x:Mh&dq?
} -o\o{?t,
} '{e9Vh<x
} pb>TUKvT&
^T^l3B[
/** :K-05$K
* @param data }(*eRF'
* @param l A"yiXc-N~\
* @param i 0Yh Mwg?
*/ 0[\^Y<ec
private void insertSort(int[] data, int start, int len) { |$hBYw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k/U1 :9
} Z>9uVBE02
} QL_vWG-
} xEULV4Qw
} @/(\YzQvp]
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堆排序： n\X'2
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package org.rut.util.algorithm.support; +JDQ`Qk
X`,=tM
import org.rut.util.algorithm.SortUtil; A }(V2
*y6zwe !M
/** S-^:p5{r
* @author treeroot q:}Q5gzZ
* @since 2006-2-2 DQ#rZi3I
* @version 1.0 df85g
*/ 8[PD`*w
public class HeapSort implements SortUtil.Sort{ [2WJ];FJ
{~L{FG)O
/* (non-Javadoc) -^R6U~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C'Gj\
*/ [9hslk
public void sort(int[] data) { g?TPRr~$9
MaxHeap h=new MaxHeap(); T+a\dgd
h.init(data); t>~a/K"
for(int i=0;i h.remove(); D@O#P^?
System.arraycopy(h.queue,1,data,0,data.length); (pDu
} G}|!Jdr
As5*)o"&
private static class MaxHeap{ ||xiKg
C[4{\3\Va
void init(int[] data){ =hw&2c
this.queue=new int[data.length+1]; #![9QUvcf
for(int i=0;i queue[++size]=data; `f|Gw5R
fixUp(size); *VP-fyJp
} sf7~hN*
} t\\oGH
ZqONK^
private int size=0; PU& v{gn
-@I+IKz
private int[] queue; 2aDjt{7P
h?8I`Z)h
public int get() { u0o}rA
return queue[1]; Ml"i^LR+
} ,$H[DX
;?q>F3n
public void remove() { bjR:5@"
SortUtil.swap(queue,1,size--); Ba8 s
fixDown(1); 3dl#:Si
} ?3duW$`
file://fixdown k}0Y&cT!rU
private void fixDown(int k) { ?W27 h
int j; /s/\5-U7q
while ((j = k << 1) <= size) { |H .
if (j < size %26amp;%26amp; queue[j] j++; gpvzOW/
if (queue[k]>queue[j]) file://不用交换 qk+RZ>T<o
break; ?"+g6II
SortUtil.swap(queue,j,k); cZb5h 9
k = j; g,k} nkIT
} )R+26wZ|n*
} tCF,KP?
private void fixUp(int k) { aSGZF w
while (k > 1) { N I*x):bx
int j = k >> 1; yPn!1=-(
if (queue[j]>queue[k]) cFV)zFu
break; ;Xr|['\'
SortUtil.swap(queue,j,k); 2HX#:y{\l
k = j; i".nnAI:
} )j_Y9`R
} }hm"49,O
fPpFAO
} pXE'5IIN
c}-WK*v
} EqYBT
Vm"{m/K0
SortUtil： `mt x+C
B-.QGf8K.
package org.rut.util.algorithm; VoGyjGt&
o-}q|tD$<
import org.rut.util.algorithm.support.BubbleSort; =/Lwprj
import org.rut.util.algorithm.support.HeapSort; L>ruNw'-K
import org.rut.util.algorithm.support.ImprovedMergeSort; _u]S/X-
import org.rut.util.algorithm.support.ImprovedQuickSort; ^&|KuI+u
import org.rut.util.algorithm.support.InsertSort; c %f'rj
import org.rut.util.algorithm.support.MergeSort; o4U[;.?c
import org.rut.util.algorithm.support.QuickSort; Z'<I Is:J
import org.rut.util.algorithm.support.SelectionSort; O:J;zv\
import org.rut.util.algorithm.support.ShellSort; Cqra\
@p\te7(P%
/** -#y^$$i0
* @author treeroot B/^1uPTZ71
* @since 2006-2-2 N t-8[J
* @version 1.0 !l7D1i~
*/ -*nd5(lY&
public class SortUtil { 8Buus
public final static int INSERT = 1; `,7;2ZG~O
public final static int BUBBLE = 2; vNn$dc
public final static int SELECTION = 3; dBeZx1Dy
public final static int SHELL = 4; g,O3\jjQ
public final static int QUICK = 5; jTh^#Q
public final static int IMPROVED_QUICK = 6; ~USU\dni
public final static int MERGE = 7; a*N<gId
public final static int IMPROVED_MERGE = 8; tB<2mjg
public final static int HEAP = 9; v-MrurQ4
vK7J;U+cJ
public static void sort(int[] data) { a{y"vVQOF
sort(data, IMPROVED_QUICK); gwQk M4
} 4f-I,)qCBk
private static String[] name={ OBp&64
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W*!u_]K>
}; !C>'a:
\)/dFo\l
private static Sort[] impl=new Sort[]{ BK[ YX)
new InsertSort(), M!#[(:
new BubbleSort(), lDf:~
new SelectionSort(), 7.!`c-8 u
new ShellSort(), fEYo<@5c]
new QuickSort(), |K11Woii
new ImprovedQuickSort(), ?E|be )
new MergeSort(), 8)m
new ImprovedMergeSort(), wF.S ,|
new HeapSort() ){M)0,:
}; _c@k>"_{S
|Ev VS
public static String toString(int algorithm){ J69B1Yi
return name[algorithm-1]; rE5q BEh
} 6d#:v"^,
.CAcG"42
public static void sort(int[] data, int algorithm) { %{j)w{ LJ
impl[algorithm-1].sort(data); yrCY-'%
} wS%j!|xhlV
M?3#XQDvD
public static interface Sort { bi<?m^j
public void sort(int[] data); JXNfE,_
} :WM[[LOaC
ns}"[44C}l
public static void swap(int[] data, int i, int j) { bKb}VP
int temp = data; ><r\ 5`
data = data[j]; x4e8;A(y
data[j] = temp; 1cvH
} T0F!0O `
} 1^R:[L4R`