[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; .2q7X{4=
} b2aPo M=
int i1=l; "o*(i7T=n
int i2=mid+1; *NS:X7p!V
for(int cur=l;cur<=r;cur++){ ;2(8&.
if(i1==mid+1) - jfZLO4
data[cur]=temp[i2++]; n[|&nv6x
else if(i2>r) 1#qyD3K
data[cur]=temp[i1++]; D.kLx@Z
else if(temp[i1] data[cur]=temp[i1++]; p[4KN(PyK
else \EuMzb"G9p
data[cur]=temp[i2++]; |>5NH'agV
} ]{jdar^
} 1\z5[ _
1.+0=M[h
} `Xc~'zG
8L`J](y
改进后的归并排序: ts`c_hH,1'
8~YhT]R=
package org.rut.util.algorithm.support; ^q-]."W]t~
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import org.rut.util.algorithm.SortUtil; H5'/i;
'h53:?~
/** z|^:1ov,
* @author treeroot 3,DUT{2
* @since 2006-2-2 :aI[ lZ
* @version 1.0 1Jg&L~Ws"
*/ y2;uG2IS_g
public class ImprovedMergeSort implements SortUtil.Sort { yDg`9q.ckm
`wj<d>m
private static final int THRESHOLD = 10; KC9_H>
.t*MGUg
/* V|e9G,z~A
* (non-Javadoc) VI: !#
* PN:/lIO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hm*1w6 =
*/ )D\!#<#h
public void sort(int[] data) { X31[
int[] temp=new int[data.length]; rV*9=
mergeSort(data,temp,0,data.length-1); 8fRk8
} rJH u~/_Dq
/FJ )gQYA
private void mergeSort(int[] data, int[] temp, int l, int r) { /Fy2ZYs,`8
int i, j, k; b-ZC~#?|b
int mid = (l + r) / 2; ^&F8NEb=2>
if (l == r) Yj)H!Cp.xD
return; \=Rw/[lR
if ((mid - l) >= THRESHOLD) mlW0ptp
mergeSort(data, temp, l, mid); 0Mpc#:a%1
else ))- B`vi
insertSort(data, l, mid - l + 1); :l~Wt7R
if ((r - mid) > THRESHOLD) eLWD?-v%
mergeSort(data, temp, mid + 1, r); }G}2Y (
else %MGbIMpY
insertSort(data, mid + 1, r - mid); >Vc;s!R
I!>pHF4
for (i = l; i <= mid; i++) { m<qPj"g~L
temp = data; {_T?0L
} C ioM!D
for (j = 1; j <= r - mid; j++) { 6..G/,TB
temp[r - j + 1] = data[j + mid]; :ZX#w`Y
} D]X&Va
int a = temp[l]; mucKmb/
int b = temp[r]; [hC-} 9
for (i = l, j = r, k = l; k <= r; k++) { =kFZ2/P2t(
if (a < b) { u}Kc>/AF
data[k] = temp[i++]; 3pg_`
a = temp; Hj\>&vMf
} else { KnK8\p88\
data[k] = temp[j--]; kEiWE|
b = temp[j]; 50h?#u6?
} F7[ 55RcP
} EAafi<n
} Zpc R
whFaL}2C
/** d h5%
* @param data /`$9H|
* @param l q$IgkL
* @param i Jd#g"a>zZ
*/ BN\Y N
private void insertSort(int[] data, int start, int len) { P5,X,-eG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <g9@iUOI
} ]$7dkP
} 4:m/w!q$
} bDK%vx!_
} 4'EC(NR7N
kq+`.
堆排序： 2smQD8t
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package org.rut.util.algorithm.support; BO]}E:C9
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import org.rut.util.algorithm.SortUtil; EhJpJb[Z
-aj) _.d
/** 3s25Rps
* @author treeroot h|m>JDxn
* @since 2006-2-2 w K)/m`{g
* @version 1.0 oMdqg4HUF
*/ 2x3%*r$
public class HeapSort implements SortUtil.Sort{ 3pQ^vbQ"
4l)Q
/* (non-Javadoc) |a!y%R=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \ct7~!qM
*/ ;F3#AO4(
public void sort(int[] data) { _}G1/`09#
MaxHeap h=new MaxHeap(); ?VM4_dugf
h.init(data); 8":O\^i
for(int i=0;i h.remove(); _pZ2^OO@
System.arraycopy(h.queue,1,data,0,data.length); #\DKU@|h
} cow]qe6K
iLhxcM2K
private static class MaxHeap{ ftr?@^
d9bc>5%-F
void init(int[] data){ o]gS=iLp
this.queue=new int[data.length+1]; UB5X2uBv
for(int i=0;i queue[++size]=data; uPZ<hG#K
fixUp(size); @xu/&pbI
} *.g@6IkAQ
} %p wpRD@
BZUA/;Hz &
private int size=0; 8y$c\Eu(mF
HzuB.B<
private int[] queue; 83~9Xb=!\
O\;R (
public int get() { 9pY`_lxa>
return queue[1]; -hn~-Sy+
} @)hrj2Jw
RlW7l1h&
public void remove() { A~Uqw8n$\
SortUtil.swap(queue,1,size--); fQ.{sQ$@h
fixDown(1); |~V`Es +j
} '5V#sq;Z
file://fixdown m`3Mev
private void fixDown(int k) { g#Doed.30=
int j; (=de#wh2]
while ((j = k << 1) <= size) { v8PH(d2{@
if (j < size %26amp;%26amp; queue[j] j++; 8r|5l~`8
if (queue[k]>queue[j]) file://不用交换 Vy+UOV&v-
break; ~sk{O%OI
SortUtil.swap(queue,j,k); uoX] #<1J
k = j; +WGL`RP
} RMrrLT
} ,sn/FT^; q
private void fixUp(int k) { OvFWX%uY
while (k > 1) { hp:8e@
int j = k >> 1; cag9f?w@V
if (queue[j]>queue[k]) 0nX.%2p#Je
break; ;?-`n4B&
SortUtil.swap(queue,j,k); VOmWRy"L
k = j; JE[+
} 1Vden.H*CI
} *CnrzrKtQ
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} ;:0gN|+
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} .*0`}H+_
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SortUtil： ZJ|@^^GcL
tOu:j [
package org.rut.util.algorithm; x>E**a?!L
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import org.rut.util.algorithm.support.BubbleSort; @C}Hx;f6
import org.rut.util.algorithm.support.HeapSort; TAXl73j_CY
import org.rut.util.algorithm.support.ImprovedMergeSort; ~582'-=+
import org.rut.util.algorithm.support.ImprovedQuickSort; KPT@I3P
import org.rut.util.algorithm.support.InsertSort; p]7Gj&a
import org.rut.util.algorithm.support.MergeSort; ;4g_~fB
import org.rut.util.algorithm.support.QuickSort; #9Fe,
import org.rut.util.algorithm.support.SelectionSort; O8J:Tw}M*
import org.rut.util.algorithm.support.ShellSort; UdSu:V|
C}~/(;1V=
/** Rlq6I?S+
* @author treeroot 7+h*&f3>
* @since 2006-2-2 wn$:L9"YN
* @version 1.0 4-YXXi}
*/ X?F$jX|c
public class SortUtil { uy,ySBY
public final static int INSERT = 1; A{7N#-h_
public final static int BUBBLE = 2; ~6hG"t]:
public final static int SELECTION = 3; I8<s4q
public final static int SHELL = 4; ElEa*70~g
public final static int QUICK = 5; !iOuIYjV
public final static int IMPROVED_QUICK = 6; ]:Q7Gys
public final static int MERGE = 7; jJ' LM>e
public final static int IMPROVED_MERGE = 8; /&+6nOP
public final static int HEAP = 9; qM$~5uu
Nr#Y]9nA
public static void sort(int[] data) { `tCOe
sort(data, IMPROVED_QUICK); ? }k~>. \
} 7 -(LWH
private static String[] name={ }UzO_&Z#6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <IF\;,.c
}; jZ'y_
<N{pMz
private static Sort[] impl=new Sort[]{ iZ`1Dzxgk
new InsertSort(), us.+nnd
new BubbleSort(), N1V qK
new SelectionSort(), Q&rf&8iH
new ShellSort(), J)l]<##
new QuickSort(), `P`nqn
new ImprovedQuickSort(), F7(~v2|
new MergeSort(), >e4
new ImprovedMergeSort(), {d;eZt `
new HeapSort() ,]N!I%SI
}; SZ9xj^"g
=f)S=0UF
public static String toString(int algorithm){ VesO/xG<
return name[algorithm-1]; o3;u*f0rWn
} X-Sso9/q.
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public static void sort(int[] data, int algorithm) { ))n7.pB9/
impl[algorithm-1].sort(data); `TkIyGr
} x*#F|N4~',
1%L* 9>e
public static interface Sort { 6,Q{/
public void sort(int[] data); %Km_Sy[7']
} dkV%Pyj
3I_"vk
public static void swap(int[] data, int i, int j) { g~L1e5C]z
int temp = data; zXB]Bf3TH
data = data[j]; p6V`b'*>
data[j] = temp; f77uqv(Y
} *it(o
} ];P^q`n=.