[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; |q"WJQ
} c+c3C8s*8
int i1=l; <GC<uB |p
int i2=mid+1; OiH tobM
for(int cur=l;cur<=r;cur++){ 1H`T=:P?
if(i1==mid+1) w-*$gk]
data[cur]=temp[i2++]; ^UHt1[
else if(i2>r) *9M 5'
data[cur]=temp[i1++]; 'L4@|c~x
else if(temp[i1] data[cur]=temp[i1++]; 9`yG[OA
else i,=greA]"
data[cur]=temp[i2++]; xa#0y
} ^=D=fX"8%
} ,rVm81-2
gq~>S1
} Sr Z\]
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改进后的归并排序: Oaf!\z}
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package org.rut.util.algorithm.support; +O>!x#)&"
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import org.rut.util.algorithm.SortUtil; Bh$hgf.C
0i/l2&x*k]
/** ??0C"8:[
* @author treeroot vY0C(jK
* @since 2006-2-2 mJe;BU"y]
* @version 1.0 /{Ksi+q
*/ .q$HL t
public class ImprovedMergeSort implements SortUtil.Sort { *ci,;-*C
w|!>>W6J
private static final int THRESHOLD = 10; )_N|r$i\
(yIl]ZN*
/* $o"Szy
* (non-Javadoc) V1 T?T9m
* (1p[K-J)r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (oO*|\9u
*/ :c3}J<Z
public void sort(int[] data) { |3`Sd;^;
int[] temp=new int[data.length]; ^vmT=f;TM
mergeSort(data,temp,0,data.length-1); F!OVx<
} 0PO'9#
G&$+8r
private void mergeSort(int[] data, int[] temp, int l, int r) { ]o`qI#{R~R
int i, j, k; ~&B{"d
int mid = (l + r) / 2; CKwrE]h
if (l == r) &.D3f"
return; MT9c:7}[&
if ((mid - l) >= THRESHOLD) Qfx(+=|
mergeSort(data, temp, l, mid); rZ5vey
else !N:!x[5
insertSort(data, l, mid - l + 1); D{g6M>,\
if ((r - mid) > THRESHOLD) +ptVAg+
mergeSort(data, temp, mid + 1, r); 3;(;'5|Z
else ?n<b:oO
insertSort(data, mid + 1, r - mid); I:l<t*
LN}eD\
for (i = l; i <= mid; i++) { Nr)v!z~y
temp = data; ][3H6T!ckL
} pwAawm
for (j = 1; j <= r - mid; j++) { SQx%CcW9d
temp[r - j + 1] = data[j + mid]; bE:oF9J?
} O* `v1>
int a = temp[l]; SRs1t6&y=
int b = temp[r]; =c>2d.^l
for (i = l, j = r, k = l; k <= r; k++) { 6p`AdDV
if (a < b) { [mX/]31
data[k] = temp[i++]; }9yAYZ0q{b
a = temp; #T:#!MKa
} else { ?RL[#d+y
data[k] = temp[j--]; ):HjpJvF
b = temp[j]; 4TcKs}z
} &1)4B
} 1Q1NircJ
} ,>%2`Z)
A*#.7Np!"
/** 1sp>UBG
* @param data j}R!'m(P'
* @param l eaLSq
* @param i &5>R>rnB
*/ *ub]M3O
private void insertSort(int[] data, int start, int len) { 88(h`RGMh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h?E[28QB
} Gq%q x4
} 3\_ae2GW
} T(t@[U2^
} kSx^Uu*
L1=+x^WQ
堆排序： %xZYIYKf
BUT{}2+K
package org.rut.util.algorithm.support; 2@K D '^(
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import org.rut.util.algorithm.SortUtil; *ue- x!"c
/Y$UJt
/** eF+:w:\h
* @author treeroot g-`HKoKe
* @since 2006-2-2 C "XvspJ
* @version 1.0 G|eY$5!i
*/ rMRM*`Q2
public class HeapSort implements SortUtil.Sort{ .^6;_s>FN
a+A^njk
/* (non-Javadoc) +oa\'.~?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,#&\1Vxf
*/ KwGk8$ U
public void sort(int[] data) { gB/4ro8
MaxHeap h=new MaxHeap(); f P'qUN
h.init(data); 7u[U%yd
for(int i=0;i h.remove(); :pj00
System.arraycopy(h.queue,1,data,0,data.length); I&JVY8'
} >iD&n4TK
egQB!%D
private static class MaxHeap{ htC~BK3(
^Ud1 ag!-
void init(int[] data){ \a\-hm
this.queue=new int[data.length+1]; U9k;)fK
for(int i=0;i queue[++size]=data; `K -j
fixUp(size); AX6z4G
} HKu? J
} fZ8%Z
' >a(|
private int size=0; { FVLH:{U^
}diB
private int[] queue; n0|oV(0FE
\Tf[% Kt x
public int get() { ~)>O=nR
return queue[1]; #oBMA
} DUBEh@
=eG?O7z&
public void remove() { DmDsn
SortUtil.swap(queue,1,size--); hM}rf6B
fixDown(1); QTZfe<m0
} *12,MO>go
file://fixdown R@*mMWW,
private void fixDown(int k) { Ky"]L~8$
int j; * V;L|c
while ((j = k << 1) <= size) { oU/CXz?H
if (j < size %26amp;%26amp; queue[j] j++; tQ!p<Q= $)
if (queue[k]>queue[j]) file://不用交换 q\+khy,k
break; OZ{YQ}t{^1
SortUtil.swap(queue,j,k); S$9>9!1>*
k = j; SN w3xO!;&
} BET3tiHV
} <}e2\x
private void fixUp(int k) { fTQ_miAlP
while (k > 1) { IQn|0$':Z
int j = k >> 1; 8MUY
if (queue[j]>queue[k]) +um Ua
break; L~x PIu
SortUtil.swap(queue,j,k); pkWJb!
k = j; l!r2[T]I@7
} 5:3%RTLG
} WhPwD6l>
_H[LUl9
} ,3 !D(&
)6K Q"*
} p)_v.D3i
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SortUtil： _i@{:v
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package org.rut.util.algorithm; F_28q15~:
pPI'0x
import org.rut.util.algorithm.support.BubbleSort; ~W?F.
import org.rut.util.algorithm.support.HeapSort; o}EipTL
import org.rut.util.algorithm.support.ImprovedMergeSort; >%qk2h>
import org.rut.util.algorithm.support.ImprovedQuickSort; -P I$SA,
import org.rut.util.algorithm.support.InsertSort; Gyo[C98
import org.rut.util.algorithm.support.MergeSort; 66A}5b4)]
import org.rut.util.algorithm.support.QuickSort; _<;;CI3w
import org.rut.util.algorithm.support.SelectionSort; eN*=wOh
import org.rut.util.algorithm.support.ShellSort; NBLiwL37{
W lDcKY
/** sZ~q|}D-
* @author treeroot Y&vn`#
* @since 2006-2-2 a4'KiA2r
* @version 1.0 SVr3OyzI
*/ vTrjhTa\
public class SortUtil { k7o49Y(#
public final static int INSERT = 1; =m<; Jx5
public final static int BUBBLE = 2; =+I~K'2
public final static int SELECTION = 3; QU`M5{#
public final static int SHELL = 4; NO(^P+s
public final static int QUICK = 5; %BdQ.\4DS
public final static int IMPROVED_QUICK = 6; XctSw
public final static int MERGE = 7; . X(^E
public final static int IMPROVED_MERGE = 8; x3./
public final static int HEAP = 9; Cxn<#Kf\-<
*t_"]v-w
public static void sort(int[] data) { "EA6RFRD
sort(data, IMPROVED_QUICK); N?Wx-pK
} X<pg^Y0
private static String[] name={ >[,ywRJ#_}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'brt?oZ%
}; /(/Z~J[
d!BQ%a
private static Sort[] impl=new Sort[]{ C!]R0L*
new InsertSort(), KyQO>g{R
new BubbleSort(), ;3 N0)
new SelectionSort(), 5m.{ayE
new ShellSort(), zWN/>~}U\
new QuickSort(), ,r$k79TI
new ImprovedQuickSort(), M%*D}s-QE
new MergeSort(), "c0I2wq
new ImprovedMergeSort(), Uavr>-
new HeapSort() Z*AT &7
}; GM1z@i\5
}}R?pU_
public static String toString(int algorithm){ )@vhqVv?
return name[algorithm-1]; &sFEe<
} Xv1SRP#
,F&TSzH[@v
public static void sort(int[] data, int algorithm) { O)0}yF$0
impl[algorithm-1].sort(data); @D?KS;#
} c"nowbf
hxCSE$f4
public static interface Sort { |2i=oX(r|
public void sort(int[] data); wiwAdYEQ\
} dC&OjBQ
tHhau.!
public static void swap(int[] data, int i, int j) { s} I8:ufT
int temp = data; W0zRV9"P
data = data[j]; ]xx}\k
data[j] = temp; F&tU^(7<
} Dd:TFZo
} h/)kd3$*'