[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; [&H?--I
} >7j(V`i"y
int i1=l; 6S6E 1~
int i2=mid+1; [(eO_I5ep
for(int cur=l;cur<=r;cur++){ ptvM>zw'~g
if(i1==mid+1) h&Q9
data[cur]=temp[i2++]; [2Rw)!N
else if(i2>r) D`fi\A
data[cur]=temp[i1++]; {H$m1=S
else if(temp[i1] data[cur]=temp[i1++]; ?~fuMy B
else o^b4l'&o
data[cur]=temp[i2++]; L7 f'
} 3|g]2|~w@h
} xfqW~&
m(c5g[6nO
} Fm,}sP"Qx
G>H',iOI
改进后的归并排序: "i3Q)$"S
?iQA>P9B
package org.rut.util.algorithm.support; +(9qAB7
Ne 9R u'B6
import org.rut.util.algorithm.SortUtil; IsjD-t
EPMdR66
/** ]&kzIxh
* @author treeroot +ysP#uAA
* @since 2006-2-2 2~BId&]
* @version 1.0 \hcb~>=C
*/ I];Hx'/<~
public class ImprovedMergeSort implements SortUtil.Sort { #Kp/AN5YC
!Qd4Y=
private static final int THRESHOLD = 10; B U^3Ux$
Z*Qra4GBl]
/* ctg[C$<q|
* (non-Javadoc) R0v5mD$:G
* &%/kPF~<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u4kg#+H
*/ e2?7>?
public void sort(int[] data) { ,:!dqonn
int[] temp=new int[data.length]; fGD#|a;,
mergeSort(data,temp,0,data.length-1); BEv>?T 0
} 5YG?m{hyn_
j+c<0,Kj
private void mergeSort(int[] data, int[] temp, int l, int r) { <Eo;CaaF/
int i, j, k; ?r,lgaw
int mid = (l + r) / 2; ttwfWfX
if (l == r) 'b* yYX<
return; 0O,l rF0'
if ((mid - l) >= THRESHOLD) #.(6.Li
mergeSort(data, temp, l, mid); }cL9`a9j
else poqx O
insertSort(data, l, mid - l + 1); _:,:U[@Vz
if ((r - mid) > THRESHOLD) }lk_Oe1
mergeSort(data, temp, mid + 1, r); /8GgEW9Q~G
else w6fVZY4
insertSort(data, mid + 1, r - mid); 1>"K<6b+
IQS:tL/
for (i = l; i <= mid; i++) { R18jju>Zr
temp = data; |8$x
} 7J]tc1-re
for (j = 1; j <= r - mid; j++) { @}K'Ic
temp[r - j + 1] = data[j + mid]; +oZq~2?*S6
} ag-\(i;K]
int a = temp[l]; ()Z!u%j
int b = temp[r]; );wSay>%(
for (i = l, j = r, k = l; k <= r; k++) { 3hOiHO ;
if (a < b) { $#g1Mx{
data[k] = temp[i++]; S=>54!{`x
a = temp; sS,Swgr
} else { M ]dS>W%U
data[k] = temp[j--]; gv}Esps R
b = temp[j]; iK$)Iy0
} `/:ZB6
} x1\,WOrmK
} /2K4ka<?7
~n$VCLa
/** ){|Bh3XV
* @param data F$UvYy4O d
* @param l _uuxTNN0x*
* @param i NKD<VMcqw
*/ 84UH& b'n
private void insertSort(int[] data, int start, int len) { c rPEr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "P<IQx
} IWvLt
} _ji"##K
} Y]aVa2!Wb
} cF9bSY_Eh
7*8R:X+^r
堆排序： a9C8Q l
}>I|\Z0I
package org.rut.util.algorithm.support; \kU0D
dd#=_xe
import org.rut.util.algorithm.SortUtil; =T'N6x5@
>4>!zZ
/** ?!=yp#
* @author treeroot <H{%`
* @since 2006-2-2 K,{P b?
* @version 1.0 >J+'hm@
*/ U|QLc
public class HeapSort implements SortUtil.Sort{ 68 %= V>V
0|kkwZVPn
/* (non-Javadoc) P,-f]k[_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q}[g/%
*/ YqhZndktX
public void sort(int[] data) { ^'j? {@
MaxHeap h=new MaxHeap(); RKoM49W
h.init(data); r(;sX
for(int i=0;i h.remove(); 6%bZZTP`
System.arraycopy(h.queue,1,data,0,data.length); 22aS <@}
} wVU.j$+_#
(}ObX!,
private static class MaxHeap{ 7e[3Pu_/X
5VD(fW[OW]
void init(int[] data){ [=k$Q (.3
this.queue=new int[data.length+1]; 7kX;|NA1
for(int i=0;i queue[++size]=data; `}t<5_
fixUp(size); jdz]+Q`jq
} -]$q8Q(hM
} 72uARF
oasp/Y.p
private int size=0; 2d),*Cvf
Qh*"B
private int[] queue; NWnUXR
%d-|C.
public int get() { 9e5XS\
return queue[1]; ]fxYSm
} SI_u0j4%*
M_ *KA
public void remove() { P/%5J3_,
SortUtil.swap(queue,1,size--); CK[w0VCT
fixDown(1); \!`k:lusa
} >\f'QQ
file://fixdown Fpe>|"&
private void fixDown(int k) { Xy(8}
int j; b&wyp@k
while ((j = k << 1) <= size) { 73C7g< Mx
if (j < size %26amp;%26amp; queue[j] j++; *vFXe_.
if (queue[k]>queue[j]) file://不用交换 Bs?B\k=
break; Z+p'3
SortUtil.swap(queue,j,k); .VD:FFkW
k = j; {"rYlN7,
} O+f'Ql
} hCpX#rg?
private void fixUp(int k) { A^L8"
while (k > 1) { d2\#Zlu<
int j = k >> 1; <GdQ""X
if (queue[j]>queue[k]) qoZUX3{
break; ,a6Oi=+>/U
SortUtil.swap(queue,j,k); Z'Uc}M'U
k = j; i>elK<R4
} w'i8yl bZ
} $M:Ru@Du2
:o37 V!
} E]MyP=g$
%f-Uwq&}Y"
} pnTuYT^%)
e&k=fV
SortUtil： oS0rP'V^
i3dV2^O
package org.rut.util.algorithm; <>l!
ABG>W>H-S
import org.rut.util.algorithm.support.BubbleSort; V#Pz`D
import org.rut.util.algorithm.support.HeapSort; ]r&dWF
import org.rut.util.algorithm.support.ImprovedMergeSort; *B*dWMh
import org.rut.util.algorithm.support.ImprovedQuickSort; ^J-"8%
import org.rut.util.algorithm.support.InsertSort; ^2f2g>9j_C
import org.rut.util.algorithm.support.MergeSort; (?ofL|Cg(
import org.rut.util.algorithm.support.QuickSort; be+]kp
import org.rut.util.algorithm.support.SelectionSort; &al\8
import org.rut.util.algorithm.support.ShellSort; ^MczumG[
KQulz
/** 7dh--.i
* @author treeroot <c!I\y
* @since 2006-2-2 oMV^W^<
* @version 1.0 n&fV^ x
*/ b&g`AnYT
public class SortUtil { gI5Fzk@:
public final static int INSERT = 1; ~i5t1
public final static int BUBBLE = 2; |]=s
public final static int SELECTION = 3; z$]HZ#aRE
public final static int SHELL = 4; R![)B97^
public final static int QUICK = 5; g@s'-8}X^
public final static int IMPROVED_QUICK = 6; :G/.h[\R|
public final static int MERGE = 7; !fT3mI6u\
public final static int IMPROVED_MERGE = 8; o4d[LV4DS
public final static int HEAP = 9; I]jK]]@
$hgsWa
public static void sort(int[] data) { R) 'AI[la
sort(data, IMPROVED_QUICK); zKf.jpF^
} hcJny
private static String[] name={ A6AIkKjzq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^hIKDc!.m
}; ?cmv;KV
1}DUe.a
private static Sort[] impl=new Sort[]{ I/Q5Y-atg
new InsertSort(), n%%u0a%
new BubbleSort(), [*2|#KSCX
new SelectionSort(), jb {5
new ShellSort(), .=% ,DT"
new QuickSort(), (U@uJ
new ImprovedQuickSort(), Xw<5VIAHm;
new MergeSort(), lBcRt)_O7
new ImprovedMergeSort(), {S=gXIh(y
new HeapSort() h 1`yW#%
}; oHj64fE9
Mz:t[rfs
public static String toString(int algorithm){ W*D].|
return name[algorithm-1]; !tr /$
} B'` jdyaE9
Z+J;nl
public static void sort(int[] data, int algorithm) { 7J$5dFV2
impl[algorithm-1].sort(data); |&xjuBC
} "RG #e+
#{L !o5
public static interface Sort { GP._C=]?c
public void sort(int[] data); e)x;3r"j
} x|oa"l^JZ"
y+ZCuX
public static void swap(int[] data, int i, int j) { Uk0]A
int temp = data; i@|.1dWh
data = data[j]; 9b}AZ]$
data[j] = temp; 4 fxD$%9
} TV&4m5
} :1JICxAU