[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 4pfix1F g
} `mq4WXO\
int i1=l; Vq .!(x
int i2=mid+1; Kc JP^
for(int cur=l;cur<=r;cur++){ c:?#zX
if(i1==mid+1) %vf2||a$BS
data[cur]=temp[i2++]; Wvut)T
else if(i2>r) 'K;4102\
data[cur]=temp[i1++]; c{m ;"ZCFS
else if(temp[i1] data[cur]=temp[i1++]; gCk y(4
else =E{{/%u{{S
data[cur]=temp[i2++]; !OuTXa,IH
} s%L" c
} (l3UNP
n3l"L|W^(<
} I9:G9
>?G|Yz*kEJ
改进后的归并排序: F653[[eQ
)F%wwc^r
package org.rut.util.algorithm.support; u'$yYzBE
m]-v IUpb
import org.rut.util.algorithm.SortUtil; A/$KA'jX
A1k&` |k
/** PNxVW
* @author treeroot [/+dHW|
* @since 2006-2-2 #U!(I#^3
* @version 1.0 Kbz7
*/ 8CnI%_Su
public class ImprovedMergeSort implements SortUtil.Sort { -KIVnV=&m
A<YZBR_
private static final int THRESHOLD = 10; U2[3S\@
(jo(bbpj
/* 86^ZYh
* (non-Javadoc) ]df9'\
* j?f,~Y<k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g6@NPQ
*/ ~/|unV
public void sort(int[] data) { 80s~ae;
int[] temp=new int[data.length]; /SPAJHh
mergeSort(data,temp,0,data.length-1); 3I>S:|=K
} ^7~SS2t!
WB=<W#?w7%
private void mergeSort(int[] data, int[] temp, int l, int r) { wCq)w=,
int i, j, k; w371.84
int mid = (l + r) / 2; Kc9mI>uH
if (l == r) 4ye`;hXy
return; ?(,5eg
if ((mid - l) >= THRESHOLD) e&H<lT
mergeSort(data, temp, l, mid); G7/?hky 0.
else qh)!|B
insertSort(data, l, mid - l + 1); -9H!j4]T?
if ((r - mid) > THRESHOLD) DX%8.@
mergeSort(data, temp, mid + 1, r); S,`Sq8H
else q*RaX 4V
insertSort(data, mid + 1, r - mid); ltr;pc*)
F"m}mf
for (i = l; i <= mid; i++) { *(\;}JF-
temp = data; GhgvRR$
} St7D.|
for (j = 1; j <= r - mid; j++) { 1)/T.q<D"
temp[r - j + 1] = data[j + mid]; ktw!T{
} tZNad
int a = temp[l]; Yyo9{4v+p{
int b = temp[r]; B yy-Cc
for (i = l, j = r, k = l; k <= r; k++) { o. V0iS]
if (a < b) { , R.+-X
data[k] = temp[i++]; ,a]~hNR*X
a = temp; -YRL>]1
} else { YW$x:
data[k] = temp[j--]; M;p q2$
b = temp[j]; [BZ(p
} T24#gF~
} E?m#S
} ^zWO[$n}tP
}%>$}4 ,
/** IjB*myN.
* @param data Z;~E+dXC
* @param l B'gk/^6$eg
* @param i $MJDB
*/ [^(R1K
private void insertSort(int[] data, int start, int len) { >e$^#\D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DO-K
} F&L?J_=
} { Sliy'
} 602eLV)
} xZ @O"*{
zIYr0k*%
堆排序： ANpY qV
WlQ&Yau
package org.rut.util.algorithm.support; Etr8lm E
S4:\`Lo-;
import org.rut.util.algorithm.SortUtil; {u_k\m[Y
E]eqvTNH
/** %*Z2Gef?H
* @author treeroot }PIGj}F/
* @since 2006-2-2 9}qfdbI
* @version 1.0 9CU6o:'fW
*/ )V$!
public class HeapSort implements SortUtil.Sort{ }rMpp[
G4exk5
/* (non-Javadoc) Znl>*e/|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q=0{E0@9({
*/ iJaNP%N
public void sort(int[] data) { ^SSOh#
MaxHeap h=new MaxHeap(); CTbhwY(/
h.init(data); Tk#&Ux{ZJ
for(int i=0;i h.remove(); 1-]x
System.arraycopy(h.queue,1,data,0,data.length); mKFHT
} 7E75s)KH
!qGx(D{\
private static class MaxHeap{ I`$I0
hIO4%RQj_
void init(int[] data){ vzrD"
this.queue=new int[data.length+1]; q(ET)xCeD
for(int i=0;i queue[++size]=data; <#x%A0
fixUp(size); uuK]<h*
} d>"$^${
} X @jYQ.
K^qUlyv
private int size=0; \PMKmJX0O
> %cWTC
private int[] queue; 9@z|2z2\G
$?AUk
public int get() { dZiWVa
return queue[1]; u*-<5&X
} ;!Z7-OZX
o`1V
public void remove() { CT:eV7<>s
SortUtil.swap(queue,1,size--); X$h~d8@r
fixDown(1); H"RF[bX(
} `:BQ&T%UQR
file://fixdown L"du"-
private void fixDown(int k) { ; 7v7V
int j; ,;e-37^0l
while ((j = k << 1) <= size) { GoVPo'
if (j < size %26amp;%26amp; queue[j] j++; [[r3fEr$!p
if (queue[k]>queue[j]) file://不用交换 p$o&dQ=n[
break; [qD<U%Hi
SortUtil.swap(queue,j,k); "T1#*"{j
k = j; H- qP>:
} E29gnYxu8
} H[!Q
private void fixUp(int k) { f, j(uP
while (k > 1) { u-M$45vct
int j = k >> 1; )E~\H+FP6
if (queue[j]>queue[k]) ;3?J#e6;
break; "JLhOTPaHf
SortUtil.swap(queue,j,k); |VR5Q(d
k = j; E?h2e~ ,]
} GGQ(|?w
} =^AZx)Kwd
+?txGHQq
} C\>Mt
3k[<4-
} -5_xI)i
2gR_1*|
SortUtil： ~rJw$v
otH[?c?BT
package org.rut.util.algorithm; Q2pboZ86
EC!Cv;'
import org.rut.util.algorithm.support.BubbleSort; I)%jPH:ua
import org.rut.util.algorithm.support.HeapSort; (5DGs_>
import org.rut.util.algorithm.support.ImprovedMergeSort; Vh9s.=*P@
import org.rut.util.algorithm.support.ImprovedQuickSort; #~-&&S4a.J
import org.rut.util.algorithm.support.InsertSort; ~0r.3KTl"Y
import org.rut.util.algorithm.support.MergeSort; |afK"N
import org.rut.util.algorithm.support.QuickSort; J8?6G&0H
import org.rut.util.algorithm.support.SelectionSort; 'xXqEwi4
import org.rut.util.algorithm.support.ShellSort; w|FVqX
QOy&!6
/** z.Kq}r^
* @author treeroot wp GnS
* @since 2006-2-2 Rf0\CEc
* @version 1.0 JEF7hJz~
*/ YM*6W?
public class SortUtil { '2J6%Gg
public final static int INSERT = 1; QV7c9)<]'}
public final static int BUBBLE = 2; o@`E.4
public final static int SELECTION = 3; |laKntv2
public final static int SHELL = 4; MkGq%AE`Y
public final static int QUICK = 5; V42*4hskL
public final static int IMPROVED_QUICK = 6; 3$yL+%i
public final static int MERGE = 7; @`8 B} C
public final static int IMPROVED_MERGE = 8; 18tQWI$
public final static int HEAP = 9; A;`U{7IST
JG4*B|3
public static void sort(int[] data) { 8+cpNX
sort(data, IMPROVED_QUICK); ` +UMZc
} y-q?pqt
private static String[] name={ o9d$ 4s@/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :.<TWBoV
}; eo52X&I
gWH9=%!
private static Sort[] impl=new Sort[]{ LU7)F,ok
new InsertSort(), A.x}%v,E
new BubbleSort(), v]SE?xF{U
new SelectionSort(), 6$<o^Ha*R
new ShellSort(), 207oEO]
new QuickSort(), =i>F^7)U1
new ImprovedQuickSort(), ko>O~@r
new MergeSort(), mKn357:
new ImprovedMergeSort(), F1*rUsRKN
new HeapSort() #TwE??ms
}; Hz3X*G\5b
!!O{ ppM
public static String toString(int algorithm){ %FFm[[nxI
return name[algorithm-1]; =\7p0cq&*
} }JMkM9]
pyJOEL]1F
public static void sort(int[] data, int algorithm) { w$:)wyR-
impl[algorithm-1].sort(data); =usDI<3r
} _`[6jhNa!
#$B,8LFz,$
public static interface Sort { yzR=:0J
public void sort(int[] data); U`_vF~el~
} OmbKx&>YGz
"$cT*}br
public static void swap(int[] data, int i, int j) { 24/~gft
int temp = data; 6="&K_Q7
data = data[j]; .p~;U|h"
data[j] = temp; Vy~$%H94
} fQ4$@
} $<mL2$.L~