[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; kJNu2S
} c.{t +OR
int i1=l; j|w_BO 9
int i2=mid+1; L IN$Y
for(int cur=l;cur<=r;cur++){ \F8:6-
if(i1==mid+1) W8N__
data[cur]=temp[i2++]; :Oh*Q(>
else if(i2>r) (X/dP ~
data[cur]=temp[i1++]; 2*pNIc
else if(temp[i1] data[cur]=temp[i1++]; *}RV)0mif
else COFCa&m9c
data[cur]=temp[i2++]; r 3FUddF'
} B#, TdP]/
} ['_W<
CT[CM+
} JWVn@)s
|0$7{nQ
改进后的归并排序: `7 3I}%?
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package org.rut.util.algorithm.support; xz*MFoE
nq 9{{oe
import org.rut.util.algorithm.SortUtil; >p>B-m
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/** kn= fW1
* @author treeroot 2'-o'z<
* @since 2006-2-2 RN ~pC
* @version 1.0 4YyVh.x
*/ W0\ n?$ZC~
public class ImprovedMergeSort implements SortUtil.Sort { I!u fw\[
bF c %
private static final int THRESHOLD = 10; ve*m\DU
&d@N3y
/* [;$9s=:[
* (non-Javadoc) ;t\C!A6
* KvNw'3Ua
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i'MpS
*/ V!zU4!@qP
public void sort(int[] data) { m/p:W/0L
int[] temp=new int[data.length]; 'M=V{.8U
mergeSort(data,temp,0,data.length-1); r%FfJM@!
} l5<&pb#b
qrkJ:
private void mergeSort(int[] data, int[] temp, int l, int r) { ~mk>9Gp
int i, j, k; ,Wlw#1fP
int mid = (l + r) / 2; 1+9}Xnxb
if (l == r) ,niQs+'<
return; S&{#sl#e
if ((mid - l) >= THRESHOLD) AI9#\$aGV
mergeSort(data, temp, l, mid); @%gth@8
else k[8{N
insertSort(data, l, mid - l + 1); C7_nA:Rc
if ((r - mid) > THRESHOLD) 8?G534*r@2
mergeSort(data, temp, mid + 1, r); 7"p%c`*;
else <>R\lPI2
insertSort(data, mid + 1, r - mid); pe>[Ts`2F
XG8UdR|
for (i = l; i <= mid; i++) { )|`w;F>
temp = data; n1)~/ >
} 0xzS9
for (j = 1; j <= r - mid; j++) { !w{(}n2Wq
temp[r - j + 1] = data[j + mid]; x]pZcx9
} lJ(];/%
int a = temp[l]; P|rreSv*
int b = temp[r]; *B%ulsm
for (i = l, j = r, k = l; k <= r; k++) { \PM5B"MDZ
if (a < b) { p&W{g$D>
data[k] = temp[i++]; f!13Ob<8r
a = temp; P*3PDa@
} else { f;]C8/W
data[k] = temp[j--]; j)Y68fKK
b = temp[j]; ^wMZG'/
} g$^I/OK?
} U^d!*9R
} =m/BH^|&W
*5q_fO
/** (x1 #_~
* @param data hs?cV)hDS
* @param l ITf4PxF
* @param i Tw@:sWC
*/ s E0ldN"
private void insertSort(int[] data, int start, int len) { xAu&O\V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zz^!QlF
} `+5,=S
} b =R9@!
} 4nU+Wj?T
} Ht&%`\9s
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堆排序： %]fi;Z
r9whW;"q
package org.rut.util.algorithm.support; !"s~dL,7
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import org.rut.util.algorithm.SortUtil; u8b^DB#+W
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/** c|(&6(r
* @author treeroot {7+y56[yu
* @since 2006-2-2 +~'ap'k m
* @version 1.0 o`~%}3
*/ O"m(C[+[
public class HeapSort implements SortUtil.Sort{ LNI]IITx/
lJdwbuB6
/* (non-Javadoc) xF7q9'/F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k_](u91
*/ Gp}}MGk
public void sort(int[] data) { z1m$8-4
MaxHeap h=new MaxHeap(); -"/l)1ox,
h.init(data); t+2,;G
for(int i=0;i h.remove(); 1LonYAHF
System.arraycopy(h.queue,1,data,0,data.length); iU"{8K,
} %-#rzeaW
f]DO2r
private static class MaxHeap{ $uCY\xqZ
`m=u2kxY
void init(int[] data){ F.@U X{J
this.queue=new int[data.length+1]; %617f=(E?!
for(int i=0;i queue[++size]=data; X$9 "dL
fixUp(size); &ngG_y8}&
} M}qrF~
} d D;r35h=
:y3e-lr
private int size=0; ILMXWw
7N}==T89[
private int[] queue; faPgp
IT0 [;eqR
public int get() { \4"01:u'
return queue[1]; mH5[(?
} 95b65f
SZL('x,"^
public void remove() { :2E?|}`7\
SortUtil.swap(queue,1,size--); /6nj 4.xxc
fixDown(1); t{o&$s93
} G ,?l o=m
file://fixdown *k<{nj@y
private void fixDown(int k) { 2; ~jKR[~
int j; (sL!nRw
while ((j = k << 1) <= size) { #*x8)6Ct
if (j < size %26amp;%26amp; queue[j] j++; jZP~!q
if (queue[k]>queue[j]) file://不用交换 [@`Ki
break; 7$|L%Sk
SortUtil.swap(queue,j,k); e2vLUlL8
k = j; Mt
} y3Lq"?h
} ];hK5
private void fixUp(int k) { g"|Z1iy|9
while (k > 1) { ,B||8W9
int j = k >> 1; m1,yf*U
if (queue[j]>queue[k]) T;Zv^:]0
break; )&wJ_(z
SortUtil.swap(queue,j,k); *?s"~XVs
k = j; JmJNq$2#c
} ,c.(&@
} t+%tN^87:
5MmSQ_
} dBM> ;S;v
`cn}}1Lg]
} i[rXs/]
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SortUtil： x'hUw*
PBY^m+
package org.rut.util.algorithm; mYw9lM
Z9k"&F~u}
import org.rut.util.algorithm.support.BubbleSort; {[$JiljD
import org.rut.util.algorithm.support.HeapSort; 4I7;/ZgALQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 7B8.;0X$W
import org.rut.util.algorithm.support.ImprovedQuickSort; +Qo]'xKr
import org.rut.util.algorithm.support.InsertSort; Mi2lBEu,
import org.rut.util.algorithm.support.MergeSort; uZkh.0yB
import org.rut.util.algorithm.support.QuickSort; _MST8
import org.rut.util.algorithm.support.SelectionSort; 6Cz%i6)
import org.rut.util.algorithm.support.ShellSort; 3,$G?auW
04P!l
/** 3Q_L6Wj~
* @author treeroot '?j,oRz^T
* @since 2006-2-2 ,G%?}TfC)
* @version 1.0 -:NFF'
*/ |"o/GUI~
public class SortUtil { 9#D?wR#J=
public final static int INSERT = 1; oH]"F
public final static int BUBBLE = 2; 3*;S%1C^
public final static int SELECTION = 3; |8s45g>
public final static int SHELL = 4; \o=YsJ8U
public final static int QUICK = 5; 8CN~o|uN
public final static int IMPROVED_QUICK = 6; ua HB\Uc
public final static int MERGE = 7; gaa;PX
public final static int IMPROVED_MERGE = 8; #(f- cK
public final static int HEAP = 9; @-H D9h
_tO:,%dL
public static void sort(int[] data) { (Aw!K`0Y1
sort(data, IMPROVED_QUICK); Q~S3d
} kNDN<L
private static String[] name={ -eSZpzp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0gOB$W
}; ';.n#
V1!;Hvm]+
private static Sort[] impl=new Sort[]{ c</u]TD
new InsertSort(), 'X{J~fEI!
new BubbleSort(), ;JAb8dyS2
new SelectionSort(), })^%>yLfc|
new ShellSort(), |6y(7Ha
new QuickSort(), ?K/N{GK%{
new ImprovedQuickSort(), HDV$y=oHh
new MergeSort(), \V/;i.ng
new ImprovedMergeSort(), ;"j>k>tg
new HeapSort() _7qGo7bpN
}; fjwUh>[ }
h:l4:{A64
public static String toString(int algorithm){ TOvpv@?-
return name[algorithm-1]; Z%1{B*(e
} fx`oe
BjsF5~+\
public static void sort(int[] data, int algorithm) { jpI=B
impl[algorithm-1].sort(data); wrmbOT
} $(JB"%S8c
QH.zsqf(
public static interface Sort { T3#KuiwU9
public void sort(int[] data); "{Jq6):mp
} ZXL
pR*)\@ma
public static void swap(int[] data, int i, int j) { g?=|kp
int temp = data; %}x$YDO
data = data[j]; =V(|3?N
data[j] = temp; Wp0L!X=0
} q/l@J3p[qm
} R}VEq gq