[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; X!xmto
} gN@|lHbU
int i1=l; k~%j"%OB
int i2=mid+1; Am ~P$dN
for(int cur=l;cur<=r;cur++){ B,S~Idr}
if(i1==mid+1) bZ0{wpeK=
data[cur]=temp[i2++]; &9Kni/
else if(i2>r) -UB XWl
data[cur]=temp[i1++]; ;cEoc(<?
else if(temp[i1] data[cur]=temp[i1++]; TJ_Wze-lQ
else gpw,bV
data[cur]=temp[i2++]; %6.WGuO
} X aE;i57$l
} Z".Xroq~
.Gt_~x
} rP{Jep!
P,J+'.@
改进后的归并排序: Y_zMj`HE
'MgYSP<
package org.rut.util.algorithm.support; c/DK31K
O!G!Gq&
import org.rut.util.algorithm.SortUtil; zm!M'|~@7
QYg V[\&
/** i 558&:
* @author treeroot S=<OS2W7+r
* @since 2006-2-2 G^|!'V
* @version 1.0 F|a'^:Qs
*/ m'zve%G
public class ImprovedMergeSort implements SortUtil.Sort { 4mHk,Dd9,
D0Mxl?S?
private static final int THRESHOLD = 10; .07"I7
Aydpr_lp
/* ;f~fGsH}e'
* (non-Javadoc) %VGW]!QR
* 8_VGB0~3i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '&+]85_&$
*/ x2sKj"2?@
public void sort(int[] data) { 5T%2al,F`
int[] temp=new int[data.length]; aGd wuD
mergeSort(data,temp,0,data.length-1); j1;<3)%0
} DRpFEWsm
riL|B3
private void mergeSort(int[] data, int[] temp, int l, int r) { KL6B!B{;
int i, j, k; 2!6E~<~HC
int mid = (l + r) / 2; d>?C?F
if (l == r) O/U?Wq
return; HSWki';G
if ((mid - l) >= THRESHOLD) {+m8^-T
mergeSort(data, temp, l, mid); ,CI-IR2
else a>6D3n W
insertSort(data, l, mid - l + 1); Q6HghG
if ((r - mid) > THRESHOLD) A%2B3@1'q
mergeSort(data, temp, mid + 1, r); HC}vO0X4
else =;4K5l{c
insertSort(data, mid + 1, r - mid); 1c{m rsB
}N}Js*
for (i = l; i <= mid; i++) { 2-DG6\QX|
temp = data; U)xebU.!S
} }hsNsQ
for (j = 1; j <= r - mid; j++) { DZ @B9<Zz{
temp[r - j + 1] = data[j + mid]; dk^jv +
} ] s^7c
int a = temp[l]; <(@Z#%O9)
int b = temp[r]; i\_LLXc
for (i = l, j = r, k = l; k <= r; k++) { Dw/vXyZ
if (a < b) { Ims?
data[k] = temp[i++]; +HPcvu?1
a = temp; R`Fgne$4
} else { Ph%{h"
data[k] = temp[j--]; SXP(C^?C
b = temp[j]; sE'c$H
} a{L&RRJ
} &XV9_{Hm
} =IW!ZN_
^r-d.1
/** Qu1&$oO
* @param data v)T# iw[
* @param l B~E">}=!
* @param i O\ _ro.
*/ >|c?ZqW
private void insertSort(int[] data, int start, int len) { 2*<Zc|uNW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8h0CG]
} z"T+J?V/
} ImG8v[Q E
} hsQDRx%H}
} ht*(@MCr<
\i/HHP[%
堆排序： ~&<t++ g
=
package org.rut.util.algorithm.support; ?QmtZG.$
HHZw-/s,%
import org.rut.util.algorithm.SortUtil; xVw@pR;
]\KVA)\
/** tewp-MKA
* @author treeroot <$yA*
* @since 2006-2-2 `u}_O(A1pA
* @version 1.0 mZ2CGOR
*/ :{N*Z}]
public class HeapSort implements SortUtil.Sort{ U#cGd\b
>I0;MNX
/* (non-Javadoc) ?)J/uU2w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u4IK7[=
*/ pHoHngyi&
public void sort(int[] data) { ;&n iZKoe
MaxHeap h=new MaxHeap(); y%ij)vQY
h.init(data); jhf# gdz%
for(int i=0;i h.remove(); HA8A}d~
System.arraycopy(h.queue,1,data,0,data.length); faDS!E' +
} NuPlrCy;
n<bU'n
private static class MaxHeap{ AwXzI;F^
L'r&'y[
void init(int[] data){ 41Z@_J|&
this.queue=new int[data.length+1]; *ma w`1
for(int i=0;i queue[++size]=data; 5\# F5s}
fixUp(size); %SOXw8-
} r@}`Sw]@
} >zqaV@T
4/|x^Ky>G
private int size=0; BK%.wi
)M.s<Y
private int[] queue; x;)I%c
e,epKtL
public int get() { VS/M@y_./
return queue[1]; W]#w4Fp!
} P4q5#r
u+Ix''Fn#%
public void remove() { dkz% Y]
SortUtil.swap(queue,1,size--); uUg;v/:
fixDown(1); tu<<pR>
} BW7AjtxQ&
file://fixdown {iX#
private void fixDown(int k) { iq*im$9J
int j; L4Zt4Yuw
while ((j = k << 1) <= size) { ~w3u(X$m"
if (j < size %26amp;%26amp; queue[j] j++; mP&\?
if (queue[k]>queue[j]) file://不用交换 _]OY[&R
break; QZ l#^-on
SortUtil.swap(queue,j,k); tO{{ci$-T
k = j; !h4T3sO
} :c~SH/qS
} TL2E|@k1]
private void fixUp(int k) { @>Yd6C
while (k > 1) { sJ|pR=g)!
int j = k >> 1; >9!J?HA
if (queue[j]>queue[k]) mFF4qbe
break; S[exnZ*Y
SortUtil.swap(queue,j,k); -DdHl8
k = j; *sOb I(&
} T4]2R
} (O{OQk;CF
fr/EkL1Dl
} ):'wxIVGI
86OrJdD8
} U;#KFZ+~
&Gjpc>d
SortUtil： >O?WRCB
`Y:]&w
package org.rut.util.algorithm; PP$sdmo
(M$0'BV0
import org.rut.util.algorithm.support.BubbleSort; s{@R|5
import org.rut.util.algorithm.support.HeapSort; G<e+sDQ2
import org.rut.util.algorithm.support.ImprovedMergeSort; q13fmK(n-5
import org.rut.util.algorithm.support.ImprovedQuickSort; -*' ?D@l
import org.rut.util.algorithm.support.InsertSort; 4>=M"DhB
import org.rut.util.algorithm.support.MergeSort; _ l|%~
import org.rut.util.algorithm.support.QuickSort; ~D9Cu>d9
import org.rut.util.algorithm.support.SelectionSort; &^"Ru?MK
import org.rut.util.algorithm.support.ShellSort; @v%Kwe1Q
d}4NL:=&
/** t|iNSy3
* @author treeroot OF7hp5
* @since 2006-2-2 SvM\9
* @version 1.0 qUd7O](b=?
*/ AB'+6QU9k
public class SortUtil { !^%3
public final static int INSERT = 1; FB[b]+t`D{
public final static int BUBBLE = 2; QEs$9a5TE
public final static int SELECTION = 3; rJ Jx8)M
public final static int SHELL = 4; Cjf[]aNJe`
public final static int QUICK = 5; 9VxM1-8Gs
public final static int IMPROVED_QUICK = 6; p-}X=O$
public final static int MERGE = 7; oh8:1E,I
public final static int IMPROVED_MERGE = 8; @e)}#kN.
public final static int HEAP = 9; 8X7??f1;Y
-x+3nb|.
public static void sort(int[] data) { <2U@O` gC
sort(data, IMPROVED_QUICK); G1z*e.+y
} X}k;(rb
private static String[] name={ VO:4wC"7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R'v~:wNTNs
}; &IQ=M.!r
uI-T]N:W8x
private static Sort[] impl=new Sort[]{ P+j=]Yg
new InsertSort(), }*6BaB
new BubbleSort(), =IC.FT}
new SelectionSort(), mITB\,,G
new ShellSort(), op}!1y$9P
new QuickSort(), S?0o[7(x*
new ImprovedQuickSort(), 45c?0tj
new MergeSort(), [h3xW
new ImprovedMergeSort(), 3^UdB9j;
new HeapSort() "r&,#$6W6
}; P$obID
`DY yK?R
public static String toString(int algorithm){ ,s~l; Gkj
return name[algorithm-1]; 5?-HQoT)G
} "ioO_
wmr?ANk
public static void sort(int[] data, int algorithm) { ^Gk`n
impl[algorithm-1].sort(data); M1kA-Xr
} {]Zan'{PCO
5.6tVr
public static interface Sort { (!nkv^]
public void sort(int[] data); yNns6
} (t-hi8"
5tlRrf
public static void swap(int[] data, int i, int j) { 1tNL)x"w
int temp = data; %Ln`c.C
data = data[j]; 6HY): M&?
data[j] = temp; efQ8jO
} @)U.Dbm
} U>PZ3