[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; DJ@n$G`^^
} FOk;=+
int i1=l; P!E2.K,
int i2=mid+1; ?h&?`WO(
for(int cur=l;cur<=r;cur++){ 3V?x&qlP>
if(i1==mid+1) aY#?QjL
data[cur]=temp[i2++]; [5& nH@og
else if(i2>r) #MlpOk*G
data[cur]=temp[i1++]; ~^V&n`*7D
else if(temp[i1] data[cur]=temp[i1++]; <K`E*IaW
else eu9*3'@A
data[cur]=temp[i2++]; GPK\nz}
} 1*Pxndt&
} |[IyqWG9
C_kuW+H
} cO*g4VL"[
N UX |
改进后的归并排序: QJRnpN/
#$-E5R;x
package org.rut.util.algorithm.support; - ~|Gwr"
%&yPl{
import org.rut.util.algorithm.SortUtil; )\=xPfs
{V2"Pym?
/** *H/3xPh,*
* @author treeroot y'`/^>.
* @since 2006-2-2 '2*OrY
* @version 1.0 a @2fJ}
*/ !43!JfD
public class ImprovedMergeSort implements SortUtil.Sort { l^9gFp~I
NBY|U{.g
private static final int THRESHOLD = 10; X<}}DZSu a
uW(-?
/* ^ls@Gr7`P
* (non-Javadoc) , :#bo]3
* YE{ [f@i0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .{h"0<x
*/ BZ?Ck[E]Z
public void sort(int[] data) { 5M~{MdF|.
int[] temp=new int[data.length]; `a4&_`E,p
mergeSort(data,temp,0,data.length-1); 5b7(^T^K
} hOUH1m.
*G> x07S)~
private void mergeSort(int[] data, int[] temp, int l, int r) { #@$80eFq
int i, j, k; *uhQP47B
int mid = (l + r) / 2; ,UMr_ e{|
if (l == r) I[Lg0H8
return; /;#kV]nF
if ((mid - l) >= THRESHOLD) b4e~Z
mergeSort(data, temp, l, mid); %-540V{q
else *y?HaU
insertSort(data, l, mid - l + 1); #`*uX6C
if ((r - mid) > THRESHOLD) !%,7*F(
mergeSort(data, temp, mid + 1, r); jU j\<aW
else phuiLW{&
insertSort(data, mid + 1, r - mid); *9EwZwE_K
A_zCSRF,
for (i = l; i <= mid; i++) { BB/wL_=:
temp = data; i D IY|
} I?3b}#&V9
for (j = 1; j <= r - mid; j++) { KFd +7C9
temp[r - j + 1] = data[j + mid]; 7Ed0BJTa
} h#hr'3bI1
int a = temp[l]; B>^6tdz
int b = temp[r]; n[iwi
for (i = l, j = r, k = l; k <= r; k++) { ^?`fN'!p
if (a < b) { Swhz\/u9
data[k] = temp[i++]; 9j>2C
a = temp; 9:USxFM
} else { DQQ]grU
data[k] = temp[j--]; 6DHK&<=D8
b = temp[j]; +?{"Q#.>;
} mrP48#Y+l
} )A7^LLzG
} 0!\C@wnH
l/'GbuECm
/** f=F:Af!
* @param data A*y4<'}<
* @param l 2d[q5p
* @param i L1SKOM$
*/ 73cb1kfPd
private void insertSort(int[] data, int start, int len) { >zW2w2O3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j~-N2b6z
} xSmG,}3mF
} pux IJ
} |u>(~6
} x.+T65X~4
%Rc#/y
堆排序： xpR`fq
1&=)Bxg4
package org.rut.util.algorithm.support; Ek)drt7cy
t{]Ew4Y4%O
import org.rut.util.algorithm.SortUtil; U6M~N0)Yr
Ib#-M;{
/** bej(Ds0
* @author treeroot ]->"4,}
* @since 2006-2-2 S;% &X
* @version 1.0 ,<Q
*/ Fc1!i8vv
public class HeapSort implements SortUtil.Sort{ t`Z'TqP R
%GhI0F #
/* (non-Javadoc) 1Toiqb/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P8z%*/ 3NF
*/ MbRTOH
public void sort(int[] data) { oe*1jR_J`[
MaxHeap h=new MaxHeap(); @|b-X? `
h.init(data); eP-|3$
for(int i=0;i h.remove(); M&V'*.xz
System.arraycopy(h.queue,1,data,0,data.length); xS,24{-HJ
} QRQZ{m
6m:$mhA5
private static class MaxHeap{ GmHDG-
[Yt{h9
void init(int[] data){ hC\ l \y
this.queue=new int[data.length+1]; (s3k2Z
for(int i=0;i queue[++size]=data; E!9WZY
fixUp(size); k H.dtg_
} A(FnU:
} FCEy1^u
%~!4DXrMk
private int size=0; 1+FVM\<&
q?}C`5%D
private int[] queue; iW` tr
Lnh=y2
public int get() { >C|pY6
return queue[1]; 2RkW/)A9
} +fKOX#%
>yC=@Uq+
public void remove() { U,=f};
SortUtil.swap(queue,1,size--); X4V>qHV72
fixDown(1); 5#DMizv6
} bJ^h{]
file://fixdown \Bo%2O%4
private void fixDown(int k) { k1wIb']m]z
int j; ,s[%,ep`
while ((j = k << 1) <= size) { >rd#,r
if (j < size %26amp;%26amp; queue[j] j++; /$c87\
if (queue[k]>queue[j]) file://不用交换 EF`}*7)
break; wMW<lT=;
SortUtil.swap(queue,j,k); 0g?)j-
k = j; ) D@j6r
} +{:uPY#1
} U^dfNi@q
private void fixUp(int k) { XY"b90
while (k > 1) { Z1HH0{q-A
int j = k >> 1; y:;.r:
if (queue[j]>queue[k]) 9;@p2t*v
break; %O\@rws
SortUtil.swap(queue,j,k); ^&>B,;Wu
k = j; 7ch9Pf
} mLhM_=
} 47q> q
t8^1wA@@V
} P 45Irir
b$_81i
} 7gC?<;\0
!.vyzCJTzB
SortUtil： ,PlH|
,H]%4@]|o
package org.rut.util.algorithm; S/]\GG{
)~U1sW&t
import org.rut.util.algorithm.support.BubbleSort; X1@DI_
import org.rut.util.algorithm.support.HeapSort; |}=eY?iXo
import org.rut.util.algorithm.support.ImprovedMergeSort; "_WN[jm
import org.rut.util.algorithm.support.ImprovedQuickSort; #3&@FzD_P
import org.rut.util.algorithm.support.InsertSort; =CLPz8
import org.rut.util.algorithm.support.MergeSort; "hk#pQ
import org.rut.util.algorithm.support.QuickSort; e*:K79y
import org.rut.util.algorithm.support.SelectionSort; n5}]C{s'
import org.rut.util.algorithm.support.ShellSort; OC=&!<
d(q1?{zr4
/** p@tg pFt
* @author treeroot *[si!e%
* @since 2006-2-2 hYJzF.DW<$
* @version 1.0 u$T]A8e
*/ U=n7RPw
public class SortUtil { <,} h8;Fr
public final static int INSERT = 1; Q %o@s3~O
public final static int BUBBLE = 2; tsb[=W!Ar8
public final static int SELECTION = 3; 2*Qv6 :qK
public final static int SHELL = 4; #mQ@4k9i
public final static int QUICK = 5; JK/{IkF
public final static int IMPROVED_QUICK = 6; :;{M0
public final static int MERGE = 7; Btm,'kBG
public final static int IMPROVED_MERGE = 8; 9j2t|D4uT
public final static int HEAP = 9; rW?WdEg
t13V>9to
public static void sort(int[] data) { <%)vl P#@
sort(data, IMPROVED_QUICK); L`1 ITz
} `5Y*) q
private static String[] name={ f?5>V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ] ?DU8
}; 2 @#yQB1
(:l6R9'=
private static Sort[] impl=new Sort[]{ 5JzvT JMx
new InsertSort(), n>'(d*[e&
new BubbleSort(), eRMN=qP.q
new SelectionSort(), ^j}C]cq{Xg
new ShellSort(), F-m%d@P&X
new QuickSort(), !rnjmc
new ImprovedQuickSort(), YmV/[{
new MergeSort(), Hx.|5n,5
new ImprovedMergeSort(), Q|_F P:
new HeapSort() ~]KdsT(=_
}; digc7;8L
YC6T0m
public static String toString(int algorithm){ SzW;Yb"#^k
return name[algorithm-1]; :>&q?xvA
} &da=hc,>%
C$w%! jE
public static void sort(int[] data, int algorithm) { u^2`$W
impl[algorithm-1].sort(data); CNNqS^ct
} [> HKRVy
[mtp-4*
public static interface Sort { ob7'''i
public void sort(int[] data); VX)8pV$
} -`L`kL<
l(>6Yq
public static void swap(int[] data, int i, int j) { a{8a[z
int temp = data; "| '~y}v_
data = data[j]; dseI~}
data[j] = temp; ZLQmEF[>
} !#0)`4O
} 0%f}Q7*R