[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; qOIVuzi*
} ;NE4G;px4<
int i1=l; `"hWbmQ
int i2=mid+1; 3Yo)K
for(int cur=l;cur<=r;cur++){ 5 D=r7
if(i1==mid+1) PpH ;p.-!d
data[cur]=temp[i2++]; {rK]Q! yj
else if(i2>r) EM`'=<)V
data[cur]=temp[i1++]; LzDRyL
else if(temp[i1] data[cur]=temp[i1++]; "$D'gSoYe
else 'Lw8l `7
data[cur]=temp[i2++]; mn\A)RQ
} Gpi_p
} ,Xr`tQ<@
9tb-;|
} bZr,jLEf
)FPn_p#3]
改进后的归并排序: q`?M+c*F
6}VFob#h8
package org.rut.util.algorithm.support; e=aU9v L
|KVVPXtq%C
import org.rut.util.algorithm.SortUtil; aqWlX0+
Djdd|Z+*{
/** g*`xEb='
* @author treeroot O /:FY1
* @since 2006-2-2 \w"~DuA
* @version 1.0 &n#yxv4
*/ BO7XN;
public class ImprovedMergeSort implements SortUtil.Sort { Z}t^i^u
0Lb{HLT
private static final int THRESHOLD = 10; t&NpC;>v
RWX!d54&
/* :H&G}T(#
* (non-Javadoc) ~mwIr
* ~<~ ~C#R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \q3ui}-9
*/ t\a|Gp W
public void sort(int[] data) { n>7aZ1Qa
int[] temp=new int[data.length]; H?!DcUg CC
mergeSort(data,temp,0,data.length-1); CJ7S5
} gFrNk Uqp
>]&Ow9-
private void mergeSort(int[] data, int[] temp, int l, int r) { u~2]$ /U
int i, j, k; k{=dV
int mid = (l + r) / 2; +S[3HX7H
if (l == r) Lis>Qr
return; 13w(Tf
if ((mid - l) >= THRESHOLD) 4T;<`{]
mergeSort(data, temp, l, mid); $d!Vxm
else M] +.xo+A
insertSort(data, l, mid - l + 1); bM5o-U#^ C
if ((r - mid) > THRESHOLD) (xoYYO
mergeSort(data, temp, mid + 1, r); uubIL+
else 17,mqXX>
insertSort(data, mid + 1, r - mid); FvG?%IFM
aWH
for (i = l; i <= mid; i++) { ;E[Q/ tr:w
temp = data; V"'PA-z3
} pPag@L
for (j = 1; j <= r - mid; j++) { gu%i|-}
temp[r - j + 1] = data[j + mid]; k3nvML,bv
} <P'FqQ]
int a = temp[l]; 'TuaP`]<
int b = temp[r]; !c{F{t-a
for (i = l, j = r, k = l; k <= r; k++) { $IjI{%
if (a < b) { U8y?S]}vo
data[k] = temp[i++]; )J0h\ky
a = temp; Cl!(F6K*
} else { %?aq1 =B
data[k] = temp[j--]; 2H0BNrYM
b = temp[j]; <<E9MIn_
} EU>`$M&w-
} !lo /L
} al-rgh
NdSuOkwwt
/** y Vm>Pj6
* @param data X{Hh^H
* @param l XZM@Rys
* @param i ;gSRpTS:
*/ EApbaS}Up
private void insertSort(int[] data, int start, int len) { 5ya^k{`+ZO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vp.?$(L^@/
} {V[}#Mf
} J|DZi2o
} -W<1BJE
} Gyy4zK
EwU)(UK
堆排序： k.K#i /t
P\<:.8@$S
package org.rut.util.algorithm.support; I[v`)T'_{
W]7/ e
import org.rut.util.algorithm.SortUtil; .-/IV^lGv
c.b| RM0;
/** **kix
* @author treeroot >:> W=
* @since 2006-2-2 FKz5,PeL
* @version 1.0 wT6zeEV~*
*/ rF"p7
public class HeapSort implements SortUtil.Sort{ uOJqj{k_."
Iv*\8?07)
/* (non-Javadoc) FVBAB>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {\%I;2X
*/ XD|g G
public void sort(int[] data) { x: _[R{B
MaxHeap h=new MaxHeap(); k4dC
h.init(data); B(94;,(
for(int i=0;i h.remove(); z F.@rXl
System.arraycopy(h.queue,1,data,0,data.length); {GLGDEb
} ujSoWs
n=C"pH#
private static class MaxHeap{ m,!SDCq
fFqYRK
void init(int[] data){ @sA!o[gH
this.queue=new int[data.length+1]; A;RV~!xx
for(int i=0;i queue[++size]=data; ^bfZd
fixUp(size); Z[d13G;
} 'ScvteQ
} L 1!V'Hm{
e@anX^M;
private int size=0; w:QO@
i2c|_B
private int[] queue; ^Y%_{
,!^5w,P:
public int get() { KNd<8{'.
return queue[1]; )Hmf=eoc
} /*,_\ ;
ktx| c19
public void remove() { D_0Vu/v
SortUtil.swap(queue,1,size--); j]<K%lwp
fixDown(1); B5|\<CF
} }UB@FRPF
file://fixdown S#y[_C?H
private void fixDown(int k) { HNv~ZAzBG-
int j; Cd"{7<OyM4
while ((j = k << 1) <= size) { wN4#j}C
if (j < size %26amp;%26amp; queue[j] j++; ]lBCK
if (queue[k]>queue[j]) file://不用交换 dp'[I:X
break; ceJi|`F
SortUtil.swap(queue,j,k); ?X6}+
k = j; ]4en|Aq
} 4,c6VCw3+
} Z%B6J>;uM
private void fixUp(int k) { X(*O$B{ R
while (k > 1) { bNVeL$'
int j = k >> 1; w,FPL&{
if (queue[j]>queue[k]) HdI)Z<Krp
break; 9%iQ~
SortUtil.swap(queue,j,k); N\ !
k = j; *Z_4bR4Q
} D\-\U E/
} o#,^7ln
yvoz 3_!
} 8Ejb/W_
*1<kYrB
} iI";m0Ny
Gw$5<%sB
SortUtil： dM^Z,;u
#Ir?v
package org.rut.util.algorithm; 0O>ClE~P
R8Vf6]s_
import org.rut.util.algorithm.support.BubbleSort; Q'jw=w!|g
import org.rut.util.algorithm.support.HeapSort; ikV;]ox
import org.rut.util.algorithm.support.ImprovedMergeSort; mL48L57Z
import org.rut.util.algorithm.support.ImprovedQuickSort; Q}L?o
import org.rut.util.algorithm.support.InsertSort; ^.!jD+=I
import org.rut.util.algorithm.support.MergeSort; hyf ;f7`o
import org.rut.util.algorithm.support.QuickSort; 71{jedT
import org.rut.util.algorithm.support.SelectionSort; A+0-pF2D
import org.rut.util.algorithm.support.ShellSort; }QE*-GVv]
u/u(Z&
/** c Pf_B=
* @author treeroot #6<1 =I'j
* @since 2006-2-2 OpEH4X.Z
* @version 1.0 F. SB_S<'
*/ j/d}B_2
public class SortUtil { K8_v5
public final static int INSERT = 1; HT.*r6Y>g
public final static int BUBBLE = 2; yQN{)rv
public final static int SELECTION = 3; ^D$|$=|DH
public final static int SHELL = 4; 6_bL<:xtY
public final static int QUICK = 5; =zcvR {Dkp
public final static int IMPROVED_QUICK = 6; CC`_e^~y=F
public final static int MERGE = 7; \toU zTT
public final static int IMPROVED_MERGE = 8; $3g{9)}
public final static int HEAP = 9; g=56|G7n
i#`q<+/q
public static void sort(int[] data) { \H@1VgmR;
sort(data, IMPROVED_QUICK); c_D(%Vf5
} sjg`4^!wDD
private static String[] name={ SscB&{f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Km8aHc]O~
}; =\WF +r]V
0\= du
private static Sort[] impl=new Sort[]{ Tn#Co$<
new InsertSort(), p2i?)+z
new BubbleSort(), yQD>7%x
new SelectionSort(), SXm%X(JU
new ShellSort(), RDp
new QuickSort(), (O5Yd 6u
new ImprovedQuickSort(), *{DTxEy
new MergeSort(), ZP<<cyY
new ImprovedMergeSort(), ^!&6=rb
new HeapSort() eMJ>gXA]
}; Zp9. ~&4o-
EJ9hgE
public static String toString(int algorithm){ a4__1N^Qj
return name[algorithm-1]; U\Wo&giP[
} tbd=A]B-
00QJ596
public static void sort(int[] data, int algorithm) { KkA)p/
impl[algorithm-1].sort(data); |h\7Q1,1~2
} -Lh7!d
3N2dV6u
public static interface Sort { ;/j2(O^
public void sort(int[] data); >CqzC8JF
} E[]5Od5#
No'?8+i
public static void swap(int[] data, int i, int j) { ecghY=%
int temp = data; {_O!mI*
data = data[j]; o eUi
data[j] = temp; go uU
} >%j%Mj@8q|
} >1Z"5F7=