[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; "2Op[~V
} p/]s)uYp$
int i1=l; %"Db?
int i2=mid+1; NO>k
for(int cur=l;cur<=r;cur++){ ]7qiUdxt:
if(i1==mid+1) fUcLfnr
data[cur]=temp[i2++]; )fh0&Y; R
else if(i2>r) et$uP
data[cur]=temp[i1++]; .]76!(fWZ
else if(temp[i1] data[cur]=temp[i1++]; =ak7ldA=2
else Rs$5PdH
data[cur]=temp[i2++]; (a{ZJI8_
} >xd<YwXZ
} =l`OHTg
W8aU"_
} RazBc.o<
.gT4_
改进后的归并排序: YL^Z4: p
C}CKnkMMD
package org.rut.util.algorithm.support; V,LVB_6
m4/}Jx[
import org.rut.util.algorithm.SortUtil; J4yt N3
QB1M3b
/** %<}=xJf>1
* @author treeroot m)f|:MM
* @since 2006-2-2 ?y-s20Kd
* @version 1.0 4#Eul
*/ i7eI=f-Q
public class ImprovedMergeSort implements SortUtil.Sort { W(&6
Hq xK\m%,.
private static final int THRESHOLD = 10; *W^=XbG
8B@JFpg^
/* O{n<WQd{CY
* (non-Javadoc) 5N1 K~".
* Vm!i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eoJ]4-WFq
*/ \p6 }
public void sort(int[] data) { v["3
int[] temp=new int[data.length]; jp m#hH{R
mergeSort(data,temp,0,data.length-1); |NEd@
} Bxv8RB
|U=(b,
private void mergeSort(int[] data, int[] temp, int l, int r) { .fJ*c
int i, j, k; g@E&uyM
int mid = (l + r) / 2; `$-lL"
if (l == r) dt~iw
return; ]P*!'iYN(
if ((mid - l) >= THRESHOLD) 97x%w]kV
mergeSort(data, temp, l, mid); @}eNV~ROu
else j-* TXog
insertSort(data, l, mid - l + 1); c$#GM57V
if ((r - mid) > THRESHOLD) .3g&9WvN!Z
mergeSort(data, temp, mid + 1, r); 2X_>vIlEm
else FaWl,}]
insertSort(data, mid + 1, r - mid); H7jTQW0rp5
cV]y=q6
for (i = l; i <= mid; i++) { eycV@|6u*
temp = data; ylkqhs&
} d;g-3Pf
for (j = 1; j <= r - mid; j++) { (9z|a,
temp[r - j + 1] = data[j + mid]; ^Fp=y,D
} ,o)4p\nV
int a = temp[l]; D-iUN
int b = temp[r]; lJj&kVHb
for (i = l, j = r, k = l; k <= r; k++) { 'bm:u
if (a < b) { IHVMHOq}'
data[k] = temp[i++]; yiO31uQt
a = temp; qvTKfIl{
} else { Ws>i)6[
data[k] = temp[j--]; 6!RikEAh
b = temp[j]; -aN":?8(G
} ,cS0
} 3k{c$x}
} ._ih$=
L?.7\a@
/** _3U|2(E
* @param data l4Y1(
* @param l >p |yf.G
* @param i xSOoIsL[
*/ 2H>aC wfX
private void insertSort(int[] data, int start, int len) { CK Mv7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z^+a*^w~{
} e/P4mc)
} )"-fHW+fy
} )rbc;{.
} r\bq[9dX>
] ?9t-
堆排序： c85O_J
:H3(w|T/
package org.rut.util.algorithm.support; .m!s". ?[
sZEgsrJh
import org.rut.util.algorithm.SortUtil; E- KK
@>CG3`?}
/** R ^^1/%
* @author treeroot voH4
* @since 2006-2-2 1)gv%_
* @version 1.0 +/}_%Cf8
*/ 7p !zp9|
public class HeapSort implements SortUtil.Sort{ PAr|1i)mB
.f+9 A>
/* (non-Javadoc) RSFJu\0}N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jDJ.
*/ ^ `E@/<w8
public void sort(int[] data) { aulaX/'-_
MaxHeap h=new MaxHeap(); [[&)cbv
h.init(data); N[]U%9[=2F
for(int i=0;i h.remove(); ny~W]1
System.arraycopy(h.queue,1,data,0,data.length); T7ki/hjRb
} G ;jF9i
v2(U(Tt
private static class MaxHeap{ fX""xTNPi
9yDFHz w
void init(int[] data){ F[(6*/46x
this.queue=new int[data.length+1]; BM.-X7)
for(int i=0;i queue[++size]=data; *seu&
fixUp(size); @n>{&^-c
} GA7u5D"0
} (Q\\Gw
at=D&oy4"+
private int size=0; ?U$}Rsk{#
.u&|e
private int[] queue; uH0#rgKt
E2-ojL[6
public int get() { $u&|[vcP0
return queue[1]; &1oaZY w
} o;*]1
%OuX`w=
public void remove() { 98jD"*W5
SortUtil.swap(queue,1,size--); .r(^h/IF
fixDown(1); h1E PaL
} 2[XltjO
file://fixdown 0&f\7z
private void fixDown(int k) { ~DK F%}E
int j; }]tFz}E\
while ((j = k << 1) <= size) { l~4_s/
if (j < size %26amp;%26amp; queue[j] j++; |z]aa
if (queue[k]>queue[j]) file://不用交换 G^ K*+
break; >@z d\}@W
SortUtil.swap(queue,j,k); j,Pwket
k = j; m\1VF\
} ~NA1SZ{Y+
} !+5C{Hs2
private void fixUp(int k) { +_P8'e%Iy
while (k > 1) { P4i3y{$V
int j = k >> 1; KU*`f{|
if (queue[j]>queue[k]) ]v<d0"2
break; CGCQa0
SortUtil.swap(queue,j,k); u0wn=Dg
k = j; S3b|wUf
} iJEB?y
} N\c&PS
9/FG,9
} keqr%:E8
=rtS#u Y
} yi sF5`+
4c
SortUtil： #_on{I
|X,$?ZDap
package org.rut.util.algorithm; 4t,zHR6W
Wk7L:uK
import org.rut.util.algorithm.support.BubbleSort; };i&a%I|
import org.rut.util.algorithm.support.HeapSort; c6f|y_2
import org.rut.util.algorithm.support.ImprovedMergeSort; D!c1;IHZ
import org.rut.util.algorithm.support.ImprovedQuickSort; wwo(n$!\
import org.rut.util.algorithm.support.InsertSort; j!6elzg
import org.rut.util.algorithm.support.MergeSort; n9N#&Q"7m
import org.rut.util.algorithm.support.QuickSort; $+A%ODv
import org.rut.util.algorithm.support.SelectionSort; 'y'T'2N3
import org.rut.util.algorithm.support.ShellSort; ,LoMt ]H
&b5T&-C<
/** ]z+*?cc
* @author treeroot bELIRM9
* @since 2006-2-2 |= tJ|
* @version 1.0 iTj"lA
*/ UY1JB^J$
public class SortUtil { YCirOge
public final static int INSERT = 1; @47[vhE
public final static int BUBBLE = 2; )>-77\
public final static int SELECTION = 3; J'I1,5(
public final static int SHELL = 4; m(8jSGV
public final static int QUICK = 5; cBg,k[,
public final static int IMPROVED_QUICK = 6; JZWgr&O<
public final static int MERGE = 7; (y-x01H
public final static int IMPROVED_MERGE = 8; R)sp
public final static int HEAP = 9; 3Ne9%"
i7i|370
public static void sort(int[] data) { #;wkr))
sort(data, IMPROVED_QUICK); Uzan7A
} -3C* P
private static String[] name={ muL>g_H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LvSP #$f
}; b`(yu.{Jn
9`)w@-~~
private static Sort[] impl=new Sort[]{ .jvSAV5B
new InsertSort(), 3'?h;`v\Lo
new BubbleSort(), omXBnzT
new SelectionSort(), )j{WeG7L
new ShellSort(), 6T R8D\
new QuickSort(), 83{x"G3>
new ImprovedQuickSort(), 'LJ %.DJ
new MergeSort(), IyrZez
new ImprovedMergeSort(), y%{*uH}SL
new HeapSort() qk_p}l-F1
}; %GVEY
+^/Nil
public static String toString(int algorithm){ R88(dEK
return name[algorithm-1]; ,maAw}=
} "[%;B0J
ZAI1p+
public static void sort(int[] data, int algorithm) { 2neF<H?^o
impl[algorithm-1].sort(data); >P<k[vF
} Ymwx(Pm
Sf+(1_^`t
public static interface Sort { }9L 40)8
public void sort(int[] data); w/lXZg
} p_rN1W Dd'
7yMieUF
public static void swap(int[] data, int i, int j) { %Nwyx;>9^K
int temp = data; )![f\!'PI
data = data[j]; n/KI"qa]9
data[j] = temp; K[iY{
} Y|hzF:ll
} s|{^ }4{