[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; } 7ND]y48
} 4dm0:, G
int i1=l; |9p0"#4u
int i2=mid+1; -<sW`HpD'
for(int cur=l;cur<=r;cur++){ c?KIHZ0
if(i1==mid+1) 3`)ej`
data[cur]=temp[i2++]; oS}fr?
else if(i2>r) Q- w_@~
data[cur]=temp[i1++]; jfVw{\l
else if(temp[i1] data[cur]=temp[i1++]; ZAn9A>5_
else bnPhhsR
data[cur]=temp[i2++]; ))nTd=
} .8GXpt^U(
} Ypxp4B
\cf'Hj}
} gI"cZ h3}
awjAv8tPO!
改进后的归并排序: '&2-{Y [!
n&a\mGF
package org.rut.util.algorithm.support; @= =)
URt+MTU[
import org.rut.util.algorithm.SortUtil; H/.UDz
7#Uzz"^
/** E25w^x2
* @author treeroot Rg+#(y
* @since 2006-2-2 1=C<aRZ b^
* @version 1.0 Mz86bb^J
*/ WF_QhKW|k
public class ImprovedMergeSort implements SortUtil.Sort { j,lI\vw<
8EX?/33$
private static final int THRESHOLD = 10; >3~)2)Q
%NTJih`
/* ,el[A`b
* (non-Javadoc) DrbjklcUU
* fVVD}GM=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =BJe}AV
*/ )heHERbJ
public void sort(int[] data) { SoHaGQox
int[] temp=new int[data.length]; ZLdIEBi=
mergeSort(data,temp,0,data.length-1); `%EcQ}Nr
} UX<)hvKj
_ n1:v~
private void mergeSort(int[] data, int[] temp, int l, int r) { D;jbZ9
int i, j, k; #!%zf{(C+
int mid = (l + r) / 2; JfK4|{@
if (l == r) EJQT\c
return; L6;'V5Mg72
if ((mid - l) >= THRESHOLD) }qWB=,8HQ
mergeSort(data, temp, l, mid); ~*UY[!+4^=
else WK@<#
insertSort(data, l, mid - l + 1); ?Zk;NL9
if ((r - mid) > THRESHOLD) Y>ATL
mergeSort(data, temp, mid + 1, r); td23Z1Elk#
else WwWCNN~}
insertSort(data, mid + 1, r - mid); (<-m|H};
'5~l{3Lw
for (i = l; i <= mid; i++) { H*+7{;$
temp = data; jW-;Y/S
} ^tI&5S]nE
for (j = 1; j <= r - mid; j++) { 4x3 _8/=
temp[r - j + 1] = data[j + mid]; t}?-ao
} b!`Ze~V
int a = temp[l]; q">}3`k
int b = temp[r]; bNiJ"k<pN
for (i = l, j = r, k = l; k <= r; k++) { Q<ia
if (a < b) { 9zrTf%mF
data[k] = temp[i++]; j]]5&u/l
a = temp; H*P+>j&
} else { (TO<SY3AB
data[k] = temp[j--]; $J,$_O6
b = temp[j]; :nc%:z=O
} z"QXPIXPk
} B., BP
} m_BpY9c]5
[p}~M-$V8Y
/** ;OD-?bC
* @param data {;zHkmx
* @param l }9#GJ:x`
* @param i d6-q"
*/ 81(\8#./
private void insertSort(int[] data, int start, int len) { Wa.!eAe}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'zT7$ .L
} J^%E$s
} UvB\kIH
} s*Z yr%R
} !?Y71:_!
4;gw&sFF
堆排序： Qz%q#4Zb
(x.qyYEoI
package org.rut.util.algorithm.support; ,# .12Q!
jUR* |
import org.rut.util.algorithm.SortUtil; riaL[4c
<S6?L[_
/** :?m"kh ~
* @author treeroot ~i'!;'-_}
* @since 2006-2-2 R~hIoaiN
* @version 1.0 (b&Z\?"
*/ 4e; le&
public class HeapSort implements SortUtil.Sort{ M(C}2.20
W$J.B!O
/* (non-Javadoc) zcH"Kh&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B9cWxe4R#
*/ {TMng&
public void sort(int[] data) { DAORfFG74
MaxHeap h=new MaxHeap(); Z("N *`VP;
h.init(data); DW:\6k
for(int i=0;i h.remove(); I69Z'}+qz
System.arraycopy(h.queue,1,data,0,data.length); T?.l_"%%d
} ZC<EPUV(
-~4kh]7%
private static class MaxHeap{ V$Oj@vI
lb=fS%
void init(int[] data){ M\7F1\ X
this.queue=new int[data.length+1]; Nt?=0X|M
for(int i=0;i queue[++size]=data; lU&2K$`
fixUp(size); .Zs.O/
} 1<lfo^B
} |o(te
)-}<}< oO
private int size=0; +2Aggv>*
aYHs35
private int[] queue; HL>l.IG?
;<E?NBV^
public int get() { Fy$C._C$
return queue[1]; 7*Zm{r@u
} |Dq?<Ha
r8czDc),b
public void remove() { Zc&pJP+M'U
SortUtil.swap(queue,1,size--); Bqk+ne
fixDown(1); ?hIDyM
} %P#| }
file://fixdown =>A}eR1Y
private void fixDown(int k) { p#rqe<Ua
int j; G2@'S&2@s
while ((j = k << 1) <= size) { HyYJ"54
if (j < size %26amp;%26amp; queue[j] j++; 7/BjWU5*
if (queue[k]>queue[j]) file://不用交换 ,MHF
break; [<f9EeziB
SortUtil.swap(queue,j,k); ?A*<Z%}1?
k = j; G#uB%:)&0u
} BuC\Bd^0
} r]~]-VZ/
private void fixUp(int k) { .O+,1&D5
while (k > 1) { pB%oFWqK
int j = k >> 1; 3qV\XC+
if (queue[j]>queue[k]) $h=v;1"
break; 0YoV`D,U
SortUtil.swap(queue,j,k); RgM=g8}M
k = j; mU||(;I
} n4H'FZ
} a/%qn-i|p
g(Oor6Pp
} ZHoYnp-~z
, BZ(-M
} 6W;`}'ap
{5+69&:G.
SortUtil： 2G3Hi;q18
wg:\$_Og
package org.rut.util.algorithm; c<Q*g
E2S#REB4
import org.rut.util.algorithm.support.BubbleSort; =i/r:
import org.rut.util.algorithm.support.HeapSort; C}9|e?R[Rz
import org.rut.util.algorithm.support.ImprovedMergeSort; jOK!k
import org.rut.util.algorithm.support.ImprovedQuickSort; AOTtAV_e
import org.rut.util.algorithm.support.InsertSort; ~1S,[5u|s
import org.rut.util.algorithm.support.MergeSort; X%7l! k[
import org.rut.util.algorithm.support.QuickSort; L,,*8
import org.rut.util.algorithm.support.SelectionSort; 5.kKg=a
import org.rut.util.algorithm.support.ShellSort; Uqly|FS &n
`sd H q
/** )M7~RN
* @author treeroot vEt+^3=
* @since 2006-2-2 Q,ZV C
* @version 1.0 rK'O 85)eU
*/ ;9Wimf]G,E
public class SortUtil { Pb59RE:7V
public final static int INSERT = 1; W3R43>$
public final static int BUBBLE = 2; IZd~Am3f
public final static int SELECTION = 3; 3B$|B,
public final static int SHELL = 4; J DOs.w
public final static int QUICK = 5; b,(<74!#8
public final static int IMPROVED_QUICK = 6; I3}I7oc_
public final static int MERGE = 7; w.=rea~
public final static int IMPROVED_MERGE = 8; W&&C[@Jd3
public final static int HEAP = 9; ^Q!A4qOQ
U\[b qw
public static void sort(int[] data) { v,iq,p)&
sort(data, IMPROVED_QUICK); F C=N}5u
} #X?E#^6?E
private static String[] name={ F9q!Upr_+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zq|NltK
}; jgfr_"@A
;9vY5CxzC
private static Sort[] impl=new Sort[]{ SkU9iW(k
new InsertSort(), h+9~^<oFl
new BubbleSort(), @U =~c9
new SelectionSort(), [Z!oVSCZD%
new ShellSort(), \+C0Rv^^
new QuickSort(), pM*( kN
new ImprovedQuickSort(), 2>Qy*
new MergeSort(), D28>e
new ImprovedMergeSort(), +zl[C
new HeapSort() $3eoZ1q'U-
}; X*&Thmee
+\>op,_9I
public static String toString(int algorithm){ ?07}\N0~
return name[algorithm-1]; <J.q[fd1*
} w)/~Gn676
&Cr4<V6-q
public static void sort(int[] data, int algorithm) { n6C!5zq7U
impl[algorithm-1].sort(data); "Sw raq
} j%81q
LFvZ 7M\\
public static interface Sort { !=6\70lJ
public void sort(int[] data); RE08\gNIt
} VaO[SW^
[Y^h)k{-$
public static void swap(int[] data, int i, int j) { Qp>Z&LvC5
int temp = data; y QGd<(
data = data[j]; A5sz[k
data[j] = temp; 9A9T'g)Du
} &{ZUY3
} 2_)gJ_kP