[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; Gw^=kzh
} a&Du5(r;!
int i1=l; \'Kj.EO{?$
int i2=mid+1; yuDd% 1k
for(int cur=l;cur<=r;cur++){ %5?-g[
if(i1==mid+1) 4^_Au^8R(
data[cur]=temp[i2++]; 5G;^OI!g
else if(i2>r) [(EH
data[cur]=temp[i1++]; }A/&]1GWk
else if(temp[i1] data[cur]=temp[i1++]; <|Eby!KXR
else eAKQR
data[cur]=temp[i2++]; 14!a)Ijl
} M;V#Gm
} DeQ'U!?+N
-01 1U!
} 6-14Htsk6
+{i"G,3
改进后的归并排序: )"jn{%/t
X]U"ru{1q
package org.rut.util.algorithm.support; Z)T@`B6
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import org.rut.util.algorithm.SortUtil; o\;"|O}
j{Jc6U
/** T^;Jz!e
* @author treeroot <&EO=A
* @since 2006-2-2 )X!DCL:16
* @version 1.0 !XA%[u
*/ V3~a!k
public class ImprovedMergeSort implements SortUtil.Sort { zn;Hs]G
pXj/6+^
private static final int THRESHOLD = 10; ~K$"PKs3
7a]Zws
/* G[<[#$(
* (non-Javadoc) $F`<&o
* 3/IWO4?_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )P9{47
*/ 1L=Qg4 H
public void sort(int[] data) { xnuv4Z}]t
int[] temp=new int[data.length]; |U$de2LF
mergeSort(data,temp,0,data.length-1); Q()RO*9
} ~muIi#4
vV\F^
private void mergeSort(int[] data, int[] temp, int l, int r) { Q'Kik5I
int i, j, k; Re,$<9V
int mid = (l + r) / 2; NuS|X
if (l == r) iraRB~
return; h[ZN >T
if ((mid - l) >= THRESHOLD) cYWy\+
mergeSort(data, temp, l, mid); BXK::M+
else CX ]\Q-y
insertSort(data, l, mid - l + 1); JGO$4DK-1
if ((r - mid) > THRESHOLD) 5ih"Nds[H
mergeSort(data, temp, mid + 1, r); <X I35\^
else YK?*7
insertSort(data, mid + 1, r - mid); 3+8"
F`BgKH!
for (i = l; i <= mid; i++) { |`Oa/\U
temp = data; Ad`[Rt']kI
} KIAe36.~
for (j = 1; j <= r - mid; j++) { bDFCZH-:'O
temp[r - j + 1] = data[j + mid]; ? __aVQ7
} X#kjt)W
int a = temp[l]; igj={==m
int b = temp[r]; !,6v=n[Nz
for (i = l, j = r, k = l; k <= r; k++) { dp[w?AMhM9
if (a < b) { 4I#eC#"
data[k] = temp[i++]; C>:/(O
a = temp; Hr<C2p^a
} else { wSJ]3gJM`
data[k] = temp[j--]; l\=-+'Y
b = temp[j]; SA(UD
} \Sw+]pr~
} ;la#Vf:]
} 7dlKdKH
hM36QOdm
/** $['7vcB^
* @param data orB8Q\p'
* @param l DD@)z0W
* @param i e:$7^Y,U/
*/ 'Wf?elB+
private void insertSort(int[] data, int start, int len) { 0tW<LR-}E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !O F?xW
} yWv<A^C&
} f E.L
} |ilv|UV
} &$b\=
uO ?Od
堆排序： 43J\8WBn@
SY$J+YBLM
package org.rut.util.algorithm.support; (@KoqwVWc
"xDx/d8B
import org.rut.util.algorithm.SortUtil; |-(IJG#)
N>A{)_k3
/** *?^Z)C>
* @author treeroot ]3O 4\o
* @since 2006-2-2 CYPazOfj
* @version 1.0 " K 8&{=
*/ KMK&[E#r
public class HeapSort implements SortUtil.Sort{ ]DC;+;8Jc
4#^'lKIx
/* (non-Javadoc) WCuzV7tw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )YzHk ;(
*/ Sc1+(z
public void sort(int[] data) { k]SAJ~bS|
MaxHeap h=new MaxHeap(); =zeFK_S!
h.init(data); f{y]
for(int i=0;i h.remove(); zH)cU%I@.
System.arraycopy(h.queue,1,data,0,data.length); -ajM5S=d*
} "t[M'[ `C
.e`,{G(5q7
private static class MaxHeap{ M11"<3]D
<91t`&aWW
void init(int[] data){ Ni2]6U
this.queue=new int[data.length+1]; 2[Z0I4r
for(int i=0;i queue[++size]=data; V19e>
fixUp(size); s<A*[
} LXHwX*`Y
} T*h!d(
SU?wFCGT%
private int size=0; Y%<`;wK=^
v~^ks{
private int[] queue; `IEq@Wr#$!
kWB, ;7
public int get() { 9pWi.J
return queue[1]; Dn~Z SrJ
} +yzcx3<
BJ~ivT<
public void remove() { +$>N]1
SortUtil.swap(queue,1,size--); ]e^R@w
fixDown(1); wA?@v|,dZ
} X?tj$
file://fixdown \r)%R5_CQ
private void fixDown(int k) { H76E+AY
int j; }o-|8P:Y
while ((j = k << 1) <= size) { ]#F q>E
if (j < size %26amp;%26amp; queue[j] j++; Rr%tbt.sE
if (queue[k]>queue[j]) file://不用交换 Tdg6kkJ
break; $fj])>=H
SortUtil.swap(queue,j,k); iJ}2"i7M
k = j; Yt -W1vl
} nz^nptw
} *5e<\{!
private void fixUp(int k) { {5>3;.
while (k > 1) { f2NA=%\
int j = k >> 1; /T,zZ9=
if (queue[j]>queue[k]) aC`Li^
break; DL,[k (
SortUtil.swap(queue,j,k); &GuF\wJ{7
k = j; S#k{e72 *
} Y+FP
} XM$GQn]B
qk&gA}qF
} (wife#)~
>;,gGH
} qmEoqU
=nzFd-P
SortUtil： ~P/]:=
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package org.rut.util.algorithm; ~x'zX-@rC
|"Z-7@/k$i
import org.rut.util.algorithm.support.BubbleSort; o5P&JBX<
import org.rut.util.algorithm.support.HeapSort; CJp-Y}fGEA
import org.rut.util.algorithm.support.ImprovedMergeSort; 6J\q`q(W(
import org.rut.util.algorithm.support.ImprovedQuickSort; pw=F' Y@N
import org.rut.util.algorithm.support.InsertSort; q3+I<qsAz
import org.rut.util.algorithm.support.MergeSort; pajy#0 U
import org.rut.util.algorithm.support.QuickSort; 8 }-7{
import org.rut.util.algorithm.support.SelectionSort; yxvjg\!&
import org.rut.util.algorithm.support.ShellSort; ~ 7}]
UeA2c_ 5
/** 6GzzGP^
* @author treeroot p5-<P?B
* @since 2006-2-2 PK+ x6]x
* @version 1.0 SiV*WxQe
*/ UT4f (Xo
public class SortUtil { ^sV|ck
public final static int INSERT = 1; 8b7;\C~$p
public final static int BUBBLE = 2; N!L'W\H,
public final static int SELECTION = 3; r{S=Z~J
public final static int SHELL = 4; ^>^\CP]
public final static int QUICK = 5; dQ<(lzS~
public final static int IMPROVED_QUICK = 6; KaW~ERx5
public final static int MERGE = 7; ,E?4f @|X
public final static int IMPROVED_MERGE = 8; xQo~%wW,?
public final static int HEAP = 9; E_3r[1l
>$uUuiyL4
public static void sort(int[] data) { %}h`+L
sort(data, IMPROVED_QUICK); b66R}=P l
} b+Vi3V
private static String[] name={ J)*8|E9P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?L\z}0#
}; hM>*a!)U
\5hw9T&[B
private static Sort[] impl=new Sort[]{ {2:d`fqD
new InsertSort(), BC({ EE~R)
new BubbleSort(), 4%7s259%
new SelectionSort(), E*k([ZL
new ShellSort(), ~C|,b"
new QuickSort(), BFh$.+D
new ImprovedQuickSort(), \f"1}f
new MergeSort(), ;&kn"b}G;
new ImprovedMergeSort(), mgVML&^
new HeapSort() K_#UZA< Y
}; B\[-fq
~^7r?<aKc
public static String toString(int algorithm){ .&iN(Bd
return name[algorithm-1]; Q#pnj thM
} dIJGB==
-k{Jp/-D
public static void sort(int[] data, int algorithm) { q- :4=vkn
impl[algorithm-1].sort(data); wyw<jH
} 0`n 5x0R
7Z0/(V.-
public static interface Sort { C[8KlD
public void sort(int[] data); ,|pp67
} kA^A mfba
$<OhGk-
public static void swap(int[] data, int i, int j) { v[&'k\
int temp = data; fHfY}BQS
data = data[j]; "8HE^Po/pn
data[j] = temp; tpYa?ZCM
} <%KUdkzEP
} Qq3fZ=