[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; H8dS]N~[Y
} :i0;jWcb
int i1=l; g.%} +5
int i2=mid+1; v#<{Y'K
for(int cur=l;cur<=r;cur++){ OW@)6
if(i1==mid+1) FeO1%#2<y
data[cur]=temp[i2++]; (#O"
else if(i2>r) Vky]In=
data[cur]=temp[i1++]; -Eq[J k
else if(temp[i1] data[cur]=temp[i1++]; `#8kJt
else Qy[S~D_
data[cur]=temp[i2++]; =&9c5"V&
} |pG0 .p4
} BOcD?rrZ0
-KfK~P3PF
} 4e AMb
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改进后的归并排序: ONDO xXs
h*!oHS~/l
package org.rut.util.algorithm.support; >G%oWRk
oJ3(7Sz
import org.rut.util.algorithm.SortUtil; +r;t]
tCGx]\
/** &k)v/
* @author treeroot J` gG`?
* @since 2006-2-2 -OU{99$aS
* @version 1.0 o,c}L9nvt
*/ }S?"mg&V
public class ImprovedMergeSort implements SortUtil.Sort { Z[]8X@IPe
zF>;7'\x
private static final int THRESHOLD = 10; B]()
$ xHtI]T
/* ^E8qI8s
* (non-Javadoc) -mh"["L"
* ]$9y7Bhj.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ml{ ]{n
*/ ?nbu`K6T
public void sort(int[] data) { EQd<!)HZ
int[] temp=new int[data.length]; 1ywdcg
mergeSort(data,temp,0,data.length-1); 19y,O0# _
} 3#dz6+
U$+,|\9
private void mergeSort(int[] data, int[] temp, int l, int r) { b6Z3(!] ]
int i, j, k; |#<z\u }
int mid = (l + r) / 2; ` V [4
if (l == r) C,$o+q*)W9
return; w%iwxo
if ((mid - l) >= THRESHOLD) `sso Wn4
mergeSort(data, temp, l, mid); +lVA$]d
else 'xG J;pY
insertSort(data, l, mid - l + 1); !5?_)
if ((r - mid) > THRESHOLD) _Z9d.-
mergeSort(data, temp, mid + 1, r); DQP!e6Of
else WSxoGly
insertSort(data, mid + 1, r - mid); srAWet
p}pd&ut1
for (i = l; i <= mid; i++) { kV T |(Y
temp = data; ?a% F3B
} cHT\sJo`l
for (j = 1; j <= r - mid; j++) { y {Bajil
temp[r - j + 1] = data[j + mid]; +PADy8
} %Y=r5'6l
int a = temp[l]; u%yYLpaKf
int b = temp[r]; qGMU>J.;c
for (i = l, j = r, k = l; k <= r; k++) { Xa#.GrH6
if (a < b) { AH/o-$C&
data[k] = temp[i++]; UQ;2g\([
a = temp; ty"L&$bf
} else { {J,"iJKop
data[k] = temp[j--]; ^0}wmxDq
b = temp[j]; js Z"T
} RN[x\",
} lMu-,Z="
} ,tg]Gt
$MwBt
/** fmQif]J;;
* @param data FGyrDRDwC
* @param l -=gI_wLbM
* @param i %W7%]Z@j
*/ \zFCph4
private void insertSort(int[] data, int start, int len) { c*E7nc)u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \mJR^t
} U/s Z1u-
} h4 9q(085V
} eWex/ m
} fiA8W
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堆排序： 6Y,&q|K
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package org.rut.util.algorithm.support; 0uW)&>W
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import org.rut.util.algorithm.SortUtil; f"*4R kG
=P9rOK=
/** k\T]*A
* @author treeroot U>.5vK.+
* @since 2006-2-2 >]gB@tn[
* @version 1.0 JU5,\3Lz#
*/ <X4f2z{T{@
public class HeapSort implements SortUtil.Sort{ H!X*29nX
W5Pur lu?
/* (non-Javadoc) HpIi-Es7C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2}/r>]9^-
*/ - ry
public void sort(int[] data) { Yu_ eCq5/
MaxHeap h=new MaxHeap(); (2L,m
h.init(data); C(B"@
for(int i=0;i h.remove(); Q$]1juqg
System.arraycopy(h.queue,1,data,0,data.length); GBRiU&D
} /|UbYe,
oPaoQbR(A
private static class MaxHeap{ =FIZh}JD
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void init(int[] data){ @}!?}QU
this.queue=new int[data.length+1]; {v=[~H>bt
for(int i=0;i queue[++size]=data; dnwzf=+>e
fixUp(size); I{U|'a
} 4xalm
} W=293mME
~'0n ]Fw
private int size=0; }b}jw.2Wu
\_R<Q?D+
private int[] queue; aBY&]6^-
k{F6WQ7
public int get() { 0Qvr g+
return queue[1]; DO*6gzW
} ^/%Y]d$
W|rAn2H
public void remove() { iiJT%Zq`#
SortUtil.swap(queue,1,size--); y $uq`FW
fixDown(1); b`S9#`
} s91[DT4
file://fixdown PZZPx<?N
private void fixDown(int k) { Rc4=zimr+
int j; pxedj
while ((j = k << 1) <= size) { Z"w}`&TC$^
if (j < size %26amp;%26amp; queue[j] j++; 4h--x~ @
if (queue[k]>queue[j]) file://不用交换 04v ~K
break; \vc&V8
SortUtil.swap(queue,j,k); ~~k0&mK|Q
k = j; Sw-2vnSdM
} Z>Rshtg
} <6+B;brh
private void fixUp(int k) { *9=}f;~
while (k > 1) { CW8YNJ'
int j = k >> 1; 7zE1>.
if (queue[j]>queue[k]) h]z8.k2n
break; ,H/O"%OJ
SortUtil.swap(queue,j,k); rOEBL|P0
k = j; :KG=3un]
} tCR~z1
} m3P7*S5NJ7
d`$w3Hy
} +cmi?~KS*
<GQ=PrT|/
} gjnEN1T22
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SortUtil： D5bi)@G7z
OT|0_d?bD
package org.rut.util.algorithm; oSy9Xw
Q$`uZ
import org.rut.util.algorithm.support.BubbleSort; <^KW7M}w*c
import org.rut.util.algorithm.support.HeapSort; @RuMo"js
import org.rut.util.algorithm.support.ImprovedMergeSort; AOcUr)
import org.rut.util.algorithm.support.ImprovedQuickSort; 811QpYA
import org.rut.util.algorithm.support.InsertSort; 1?8M31
import org.rut.util.algorithm.support.MergeSort; T9r6,yY
import org.rut.util.algorithm.support.QuickSort; \?8q&o1=]
import org.rut.util.algorithm.support.SelectionSort; &;JeLL1J
import org.rut.util.algorithm.support.ShellSort; 8 Elhcs
3jJV5J'"
/** Gkfzb>_V]
* @author treeroot ~/aCzx~
* @since 2006-2-2 j)iUg03>/4
* @version 1.0 \/Q~C!
*/ X#ha*u~U
public class SortUtil { *x p_#
public final static int INSERT = 1; D[6sy`5l
public final static int BUBBLE = 2; bvhV
public final static int SELECTION = 3; !e |Bi{
public final static int SHELL = 4; |<oqT+?i
public final static int QUICK = 5; x.|sCqx
public final static int IMPROVED_QUICK = 6; c0&!S-4M
public final static int MERGE = 7; OQ<;w
public final static int IMPROVED_MERGE = 8; ze5#6Vzd&
public final static int HEAP = 9; wCv9VvF`
u:W/6QS
public static void sort(int[] data) { 152s<lu1Z
sort(data, IMPROVED_QUICK); l>s@&%;Mg
} |90/tNe
private static String[] name={ }>621L3 -
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +N2ILE8[<
}; *u,&?fCl
-*T0Cl.
private static Sort[] impl=new Sort[]{ Rd]<591
new InsertSort(), !>Q\Y`a,*
new BubbleSort(), ^AOJ^@H^>
new SelectionSort(), oGg<s3;UND
new ShellSort(), +eLL)uk
new QuickSort(), }jWg&<5+z
new ImprovedQuickSort(), M5_t#[ [
new MergeSort(), `0q=Z],
new ImprovedMergeSort(), 7z/O#Fbs
new HeapSort() 4:b'VHW.
}; @PQd6%@
tk8\,!9Q
public static String toString(int algorithm){ pSYEC,0B
return name[algorithm-1]; SsfC m C
} CMv8n@ry
V;J3lV<
public static void sort(int[] data, int algorithm) { 6^BT32,'
impl[algorithm-1].sort(data); -G_3B(]`
} {KEmGHC4R
H%Lln#
public static interface Sort { m,]9\0GUd
public void sort(int[] data); 9p^gF2?k
} ty%,T.@e
^4<&"aoo
public static void swap(int[] data, int i, int j) { }mUb1b
int temp = data; Q~' \oWz
data = data[j]; 2!b##`UjA7
data[j] = temp; `Nz`5}8.?
} .XkVdaX
} 4mX?PKvbn