[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; `'3 De(
} c(FGW7L<
int i1=l; -r_\=<(
int i2=mid+1; :"Tkl$@,
for(int cur=l;cur<=r;cur++){ 89{;R
if(i1==mid+1) uR.pQo07y<
data[cur]=temp[i2++]; V lO^0r^z
else if(i2>r) FV aC8Kw
data[cur]=temp[i1++]; QHUFS{G]
else if(temp[i1] data[cur]=temp[i1++]; 'NfsAE
else 6-/W4L)?>
data[cur]=temp[i2++]; qvGmJN0
} COw!a\Jl
} "-MB U
4^nHq 4_
} (e!Yu#-
SAf)#HXa
改进后的归并排序: /n>vPJvz
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package org.rut.util.algorithm.support; *14:^neoI
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import org.rut.util.algorithm.SortUtil; O:T 49:R}r
|*h{GX.(
/** |]?W`KN0
* @author treeroot 8f)pf$v`
* @since 2006-2-2 fi~@J`
* @version 1.0 )t7MD(
*/ GVn'p Wg
public class ImprovedMergeSort implements SortUtil.Sort { 7 <]YK`a2d
n6Uf>5
private static final int THRESHOLD = 10; < ]+Mdy
wmXI8'~F&
/* xt"-Jmox
* (non-Javadoc) u(f;4`
* +|pYu<OY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gae=+@z
*/ 5T(cy
public void sort(int[] data) { 7,Z<PE
int[] temp=new int[data.length]; ZHeq)5C ;f
mergeSort(data,temp,0,data.length-1); ZfVY:U:o>
} 6|3 X*Orn
'|5o(6u'
private void mergeSort(int[] data, int[] temp, int l, int r) { y x#ub-A8
int i, j, k; ev+H{5W8
int mid = (l + r) / 2; h?B1Emlq
if (l == r) !?+0O]`}
return; Xc" %-
if ((mid - l) >= THRESHOLD) =OPX9oG
mergeSort(data, temp, l, mid); ! os@G
else >mJ`904L
insertSort(data, l, mid - l + 1); 'X6Y!VDd
if ((r - mid) > THRESHOLD) gE=9K @
mergeSort(data, temp, mid + 1, r); wS&D-!8v
else KECW~e`
insertSort(data, mid + 1, r - mid); di9OQ*6a7
5_L,7\5#
for (i = l; i <= mid; i++) { vZ$E [EG}
temp = data; VGxab;#,:3
} .j|uf[?h
for (j = 1; j <= r - mid; j++) { /Qef[$!(
temp[r - j + 1] = data[j + mid]; .Z"`:4O
} /4;A.r`;
int a = temp[l]; I2SH j6-
int b = temp[r]; o&z[d
for (i = l, j = r, k = l; k <= r; k++) { DS7L}]
if (a < b) { NW3qs`$-(
data[k] = temp[i++]; 8+".r2*_iO
a = temp; fB,eeT1v?h
} else { $ywROa]
data[k] = temp[j--]; 9b,0_IMHH
b = temp[j]; J:ka@2>|
} |r)QkxdU,
} V,'_BUl+x
} _j0xL{&&
rbIYLVA+V
/** afD {w*[8
* @param data p>3QW3<
* @param l a;-%C{S9r
* @param i I\c7V~^hnG
*/ ONy\/lu|
private void insertSort(int[] data, int start, int len) { E.ji;5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W ;+()vC
} Y}t)!}p$r
} XIZN9/;
} *o:J 4'
} vZ57 S13
iD])E/
堆排序： z#P`m,~t0
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package org.rut.util.algorithm.support; k\j_hu
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import org.rut.util.algorithm.SortUtil; %, iAngF'
JZ5";*,
/** birc&<
* @author treeroot -U A &Zt
* @since 2006-2-2 d8+@K&z|
* @version 1.0 dKU:\y
*/ Vky]In=
public class HeapSort implements SortUtil.Sort{ Kr1Y3[iNv
oz,.gP%
/* (non-Javadoc) Buh}+n2]5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `^'fS@VA
*/ *jPd=+d
public void sort(int[] data) { wQd8/&mmk
MaxHeap h=new MaxHeap(); %la1-r~
h.init(data); c?}G;$
for(int i=0;i h.remove(); 5kQ@]n:<k
System.arraycopy(h.queue,1,data,0,data.length); %0/qb0N&
} kTI5CoXzq
Q3^h
private static class MaxHeap{ S^p^) fAmF
&k)v/
void init(int[] data){ Kz/,V6H:
this.queue=new int[data.length+1]; S^==$TT
for(int i=0;i queue[++size]=data; mf{M-(6'
fixUp(size); ='4)E6ea?
} /EP zT7
} f_xvXf:
9Oq(` 4
private int size=0; |K{d5\_
c?. i;4yh
private int[] queue; w%X@os}E
GbZ~eI`,2
public int get() { (U# Oj"
return queue[1]; 5p:BHw;%;
} IpSWg
YwF&-~mp7n
public void remove() { yZ)9Hd
SortUtil.swap(queue,1,size--); aT}Hc5L,b
fixDown(1); !vpXXI4
} Cj`~ntMN
file://fixdown +WMXd.iN,
private void fixDown(int k) { ;s3\Z^h4kd
int j; eiyr^Sch.
while ((j = k << 1) <= size) { GI,TE
if (j < size %26amp;%26amp; queue[j] j++; WG\ _eRj
if (queue[k]>queue[j]) file://不用交换 oA7DhU5n
break; 2@ 9?~?r
SortUtil.swap(queue,j,k); G/(,,T}eG
k = j; %D:VcY9OC
} S$$SLy:P
} #Ktk["6
private void fixUp(int k) { L97 ~ma
while (k > 1) { T`Up%5Dk
int j = k >> 1; BN%cX2j
if (queue[j]>queue[k]) %*npLDi
break; p}pd&ut1
SortUtil.swap(queue,j,k); wuYak"KX
k = j; &QW&K
} _6r[msH"
} 9s[
0!ZaR6
} `O0Qtq.
Ert={"Q
} !uIY,
vWM&4|Q1~
SortUtil： 0,0Z!-Y
'Q:%s
package org.rut.util.algorithm; uYg Q?*Z
")vtS}Ekt
import org.rut.util.algorithm.support.BubbleSort; /!?Tv8TPp
import org.rut.util.algorithm.support.HeapSort; ;|?_C8
import org.rut.util.algorithm.support.ImprovedMergeSort; @{_X@Wv4iV
import org.rut.util.algorithm.support.ImprovedQuickSort; 4;AQ12<[1
import org.rut.util.algorithm.support.InsertSort; (?^F }]
import org.rut.util.algorithm.support.MergeSort; ^p9V5o
import org.rut.util.algorithm.support.QuickSort; Tsb}\
import org.rut.util.algorithm.support.SelectionSort; N wNxO
import org.rut.util.algorithm.support.ShellSort; \7*|u
UF-'(
/** ]a&riPh"
* @author treeroot zx2`0%Q
* @since 2006-2-2 K\;4;6g
* @version 1.0 7.ein:M|CB
*/ MD<x{7O12>
public class SortUtil { nw`rH*
public final static int INSERT = 1; YsVKdh
public final static int BUBBLE = 2; <8kCmuGlk
public final static int SELECTION = 3; LAlX|b
public final static int SHELL = 4; >Ovz;
public final static int QUICK = 5; d-e/0F!
public final static int IMPROVED_QUICK = 6; B;NK\5>
public final static int MERGE = 7; }s@IQay+
public final static int IMPROVED_MERGE = 8; *C+[I
public final static int HEAP = 9; a.gMH uL
0)b1'xt',
public static void sort(int[] data) { "9aFA(H6w
sort(data, IMPROVED_QUICK); er-0i L@
} [hg9 0Q6
private static String[] name={ Kg>B$fBx)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /.!&d^
}; >yP>]r+
9e>2kd
private static Sort[] impl=new Sort[]{ 3gVU#T[[
new InsertSort(), +2 oZML
new BubbleSort(), cl&?'` )
new SelectionSort(), O{\<Izm`D
new ShellSort(), VBDb K|
new QuickSort(), <D)@;A
new ImprovedQuickSort(), o&@y^<UQ
new MergeSort(), =EA @
new ImprovedMergeSort(), {Ke IYjE
new HeapSort() +$(y2F7|u-
}; wA/!A$v(
uuD2O )v
public static String toString(int algorithm){ LK*9`dzv=G
return name[algorithm-1]; `fX\pOk~e
} y_q1Y70i2r
;R2A>f~
public static void sort(int[] data, int algorithm) { h>[ qXz
impl[algorithm-1].sort(data); z(^dwMw}
} .6 0yQ[aE
NopfL
public static interface Sort { {cLWum[SY
public void sort(int[] data); Viw,YkC
} <b_K*]Z
R_GA`U\ {
public static void swap(int[] data, int i, int j) { -X%twy=
int temp = data; U"Bge\6x=
data = data[j]; 8,vP']4r%
data[j] = temp; fSVM[
} hslT49m>
} u^E0u^