[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; SiJX5ydz
} ;Y16I#?;Kh
int i1=l; /XW,H0pR
int i2=mid+1; *$>$O%
for(int cur=l;cur<=r;cur++){ >l5JwwG
if(i1==mid+1) j8p'B-yS
data[cur]=temp[i2++]; fKT(.VNq5
else if(i2>r) d>7bwG+k
data[cur]=temp[i1++]; 6d/b*,4[
else if(temp[i1] data[cur]=temp[i1++]; fmq^AnKd
else 6UJBE<ntj
data[cur]=temp[i2++]; 4HDQj]z/
} dzMI5fA<_
} 4^B:Q9B)
Py,@or7n
} ?jzadCel
cl-i6[F
改进后的归并排序: x9CI>l
UJF }Ye
package org.rut.util.algorithm.support; DSHpM/7
5*>3(U
import org.rut.util.algorithm.SortUtil; ]# T9v06w
WJL,L[XC
/** ]t3 NA*mM
* @author treeroot P.1iuZ "w
* @since 2006-2-2 I!Za2?
* @version 1.0 `P4qEsZE>`
*/ VVje|T^{Z
public class ImprovedMergeSort implements SortUtil.Sort { }fs;yPl,
)+9D$m=P;
private static final int THRESHOLD = 10; egi?Qg
G8?<(.pi@
/* K+mtuB]yr
* (non-Javadoc) Qi7^z;
* ,K6]Q|U@r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j|(bDa4\
*/ ArU>./)Q
public void sort(int[] data) { BmUzsfD
int[] temp=new int[data.length]; Xl*-A|:j
mergeSort(data,temp,0,data.length-1); ;3sT>UB
} Sb[rSczS~
T}]Ao
private void mergeSort(int[] data, int[] temp, int l, int r) { {UZli[W1
int i, j, k; [l5"'{x
int mid = (l + r) / 2; JnY3]
if (l == r) pN]Hp"v
return; cCV"(Oo[H|
if ((mid - l) >= THRESHOLD) |I+E`,n"b
mergeSort(data, temp, l, mid); L}a3!33)C
else n8G#TQrAE
insertSort(data, l, mid - l + 1); 1I^Sv
if ((r - mid) > THRESHOLD) p go\(K0
mergeSort(data, temp, mid + 1, r); 3Yj}ra}
else Jp-ae0 Ewa
insertSort(data, mid + 1, r - mid); ?s"v0cg+
*E)Y?9u"
for (i = l; i <= mid; i++) { M*S5&xpX
temp = data; 4l`gAE$
} 8:xQPd?3
for (j = 1; j <= r - mid; j++) { j'J*QK&Q
temp[r - j + 1] = data[j + mid]; 8rpN2M3h
} S8)awTA9
int a = temp[l]; \!V6` @0KC
int b = temp[r]; 0\~Zg
for (i = l, j = r, k = l; k <= r; k++) { eXaDx%mM
if (a < b) { TQ2Tt"
data[k] = temp[i++]; _5LlL#)
a = temp; [1UqMkXtf
} else { GQZUC\cB
data[k] = temp[j--]; _INUJc
b = temp[j]; 9,c>H6R7
} Cp* n2
} ,/ : )FV
} vxt^rBA
=% JDo
/** )yK!qu
* @param data I^|bQ3sor
* @param l '} kq@
* @param i ;i#gk%- 2
*/ ^,5.vfES
private void insertSort(int[] data, int start, int len) { ^9RBG#ud
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g0U ?s
} z} \9/`
} rN~`4mZ
} By_Ui6:D
} Mww]l[1'EL
D{l((t3=T
堆排序： .0|J+D
yW&iUh=0
package org.rut.util.algorithm.support; !jW32$YTR
"%]dC{
import org.rut.util.algorithm.SortUtil; wg1pt1 `
HlSuhbi'@
/** wm8x1+P
* @author treeroot "J1ar.li
* @since 2006-2-2 8dhY"&
* @version 1.0 .-ABo]hf
*/ 80EY7#r@w
public class HeapSort implements SortUtil.Sort{ V"ZbKV+[
g3XAs@
/* (non-Javadoc) |@HdTGD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z>:7}=H0
*/ jb2:O,+!
public void sort(int[] data) { a=FRJQ8S
MaxHeap h=new MaxHeap(); u3:Qt2^S
h.init(data); gNd J=r4
for(int i=0;i h.remove(); YeLOd
System.arraycopy(h.queue,1,data,0,data.length); Sv@p!-m
} 1#<E]<='t
}(K6 YL
private static class MaxHeap{ hI8C XG
g4X,*H
void init(int[] data){ #U}U>4'
this.queue=new int[data.length+1]; FudD
for(int i=0;i queue[++size]=data; GvOAs-$
fixUp(size); QO.gt*"
} $rEd5W&d!
} jZ!JXmVV
eLny-.i,7
private int size=0; 0Y2^}u@5
[BBKj)IK
private int[] queue; F/SsiUBS
Cpcd`y=IN
public int get() { h$k3MhYDes
return queue[1]; '>Y 2lqa
} =7Vl{>*1N
Z5L1^
public void remove() { zYdtQjv
SortUtil.swap(queue,1,size--); i@Zj7#e*
fixDown(1); J\'5CG
} rb'GveW[
file://fixdown `Qf :PX3
private void fixDown(int k) { \cP'#jZz
int j; }GDG$QI]K&
while ((j = k << 1) <= size) { !nq\x8nU
if (j < size %26amp;%26amp; queue[j] j++; 0Zh _Q
if (queue[k]>queue[j]) file://不用交换 8M9\<k6
break; nln6:^w
SortUtil.swap(queue,j,k); S "Pj1
k = j; wPJRp]FA
} #cG479X"
} [B3aRi0AQ
private void fixUp(int k) { ~!F4JRf
while (k > 1) { [?@wCY4=
int j = k >> 1; BkxhF
if (queue[j]>queue[k]) Bq]O &>\hX
break; ('q vYQ
SortUtil.swap(queue,j,k); az;jMnPpR5
k = j; s;7qNwYO
} %*c|[7Z~V
} (iOCzZ6S
/^3oq]
} kO_XyC4(
N"RYM~c7
} "%Ana=cc
m%c0#=D
SortUtil： F}(QKO*
n E}<e:
package org.rut.util.algorithm; Ygi1"X}
FP'lEp
import org.rut.util.algorithm.support.BubbleSort; 1`]IU_)1B
import org.rut.util.algorithm.support.HeapSort; <-:@} |br
import org.rut.util.algorithm.support.ImprovedMergeSort; J%:/<uCmZ
import org.rut.util.algorithm.support.ImprovedQuickSort; 4)+IO;
import org.rut.util.algorithm.support.InsertSort; %Rep6=K*$
import org.rut.util.algorithm.support.MergeSort; p <=%
import org.rut.util.algorithm.support.QuickSort; !NLvo_[Y
import org.rut.util.algorithm.support.SelectionSort; DsJn#>?Kh
import org.rut.util.algorithm.support.ShellSort; SWjQ.aM
Q!Ow{(|
/** ~po%GoH(K
* @author treeroot Va Yu%
* @since 2006-2-2 &^n>ZY,
* @version 1.0 rk,1am:cg
*/ g~c|~u(W
public class SortUtil { Tj21YK.mk
public final static int INSERT = 1; ~]W[ {3 ;
public final static int BUBBLE = 2; O| J`~Lk
public final static int SELECTION = 3; u] U)d$|
public final static int SHELL = 4; 9jR[:[
public final static int QUICK = 5; 8$v zpu
public final static int IMPROVED_QUICK = 6; /;NE]{K
public final static int MERGE = 7; Bd9hf`%2
public final static int IMPROVED_MERGE = 8; +lgF/y6
public final static int HEAP = 9; gMBQtPNM
2K rqY
public static void sort(int[] data) { L;M^>{>
sort(data, IMPROVED_QUICK); s"',370
} `}~)1'(#/
private static String[] name={ Q A)9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6~F#F)C'
}; c Z6p^
P%+or*
private static Sort[] impl=new Sort[]{ Wda\a.bXT
new InsertSort(), P"9@8aLB
new BubbleSort(), vDW&pF_eI>
new SelectionSort(), 4l ZJb
new ShellSort(), HKiVEg
new QuickSort(), H*{k4
new ImprovedQuickSort(), dmaqXsU8q
new MergeSort(), ?D(FNd
new ImprovedMergeSort(), } }f_
new HeapSort() K)Zkj"y
}; #5-A&
Xvu)
public static String toString(int algorithm){ P 0Efh?oZ
return name[algorithm-1]; Y$x"4=~
} R] Disljq
"VDk1YX_&l
public static void sort(int[] data, int algorithm) { G&@-R{i
impl[algorithm-1].sort(data); nR o=J5tY
} X"k^89y$
9eGCBVW:*
public static interface Sort { hg&w=l
public void sort(int[] data); Q)G!Y (g\
} Kunle~Ro
&$m=^
public static void swap(int[] data, int i, int j) { 3V/_I<y
int temp = data; xHv|ca.E
data = data[j]; x[PEn
data[j] = temp; q8?=*1g
} ,TF<y#wed
} #u8*CA9