[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; {-`OE
} /)4r2x
int i1=l; >qvD39w
int i2=mid+1; jeFl+K'1
for(int cur=l;cur<=r;cur++){ ]b| @<E7Y
if(i1==mid+1) <d`UifqD
data[cur]=temp[i2++]; 6i9I 4*'
else if(i2>r) FOG+[v
data[cur]=temp[i1++]; >t}D5ah
else if(temp[i1] data[cur]=temp[i1++]; 1CVaGD^r{
else r3vj o(
data[cur]=temp[i2++]; =F[,-B~
} 2=M!lB *
} hD"~ ^
-XG$ 0
} h5keYBA
9d}nyJ
改进后的归并排序: 8J1.(Mwb?
J*C*](
package org.rut.util.algorithm.support; ]LOtwY
}jgAV
import org.rut.util.algorithm.SortUtil; :{Z^ _;Tf
p&l:937
/** k $&A
* @author treeroot deY<+!
* @since 2006-2-2 2A ,36,
* @version 1.0 BVp.A]
*/ K3D $ hb
public class ImprovedMergeSort implements SortUtil.Sort { [E7@W[xr
Jz0S2&
private static final int THRESHOLD = 10; tp2 _OQAQ
o9\m?~g!E
/* ..TjEBp
* (non-Javadoc) <F & hfy
* 'B6H/d>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +[[gU;U"v
*/ hzo,.hS's
public void sort(int[] data) { :/l
int[] temp=new int[data.length]; 1&"1pH
mergeSort(data,temp,0,data.length-1); 0^Cx`xdX:
} 4344PBj
p<19 Jw<
private void mergeSort(int[] data, int[] temp, int l, int r) { JCfToFB
int i, j, k; R\amcQ 9
int mid = (l + r) / 2; |c/rHEZ
if (l == r) m:Abq`C
return; O_Q,!&*6
if ((mid - l) >= THRESHOLD) *60)Vo.=
mergeSort(data, temp, l, mid); y-#tU>P
else gNQJ:!
insertSort(data, l, mid - l + 1); }!Lr!eALr
if ((r - mid) > THRESHOLD) h!~yYNQ"
mergeSort(data, temp, mid + 1, r); !:{_<C"D
else ksp':2d}
insertSort(data, mid + 1, r - mid); 0pOha(,~
`VN<6o(
for (i = l; i <= mid; i++) { ?%ntO]
temp = data; x=N;>
} @R{&>Q:.
for (j = 1; j <= r - mid; j++) { cEu98nP
temp[r - j + 1] = data[j + mid]; ix`xdVj`
} ^dD?riFAk
int a = temp[l]; fZgU@!z
int b = temp[r]; \RO Sd
for (i = l, j = r, k = l; k <= r; k++) { >WX'oP(<
if (a < b) { mIodD)?{
data[k] = temp[i++]; ^%JWc 3jZ
a = temp; tH(#nx8
} else { ,-kZ5&r
data[k] = temp[j--]; i(HhL&
b = temp[j]; ^O m]B;
} yQ50f~9
} E5Jk+6EcMa
} Y))sk-
vq:j?7
/** 6si-IJ
* @param data r |/9Dn%
* @param l r+u\jZ
* @param i pE,BE%
*/ PX)qA=4q
private void insertSort(int[] data, int start, int len) { _P1-d`b0 a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j"s(?
} MJ08@xGa
} #u@!O%MJ
} Rby7X*.-v
} l !v#6#iq
v^G5 N)F
堆排序： ?VsZo6Z"
+%v4Ci"%y
package org.rut.util.algorithm.support; ;7>--_?=
5Ncd1
import org.rut.util.algorithm.SortUtil; iI0'z=J
\-yi#N
/** 6I0MJpLW
* @author treeroot g*M3;G
* @since 2006-2-2 O~VUViS6$
* @version 1.0 WgB,,L,
*/ YeJdkt
public class HeapSort implements SortUtil.Sort{ &YNhKm@"
6}$cDk`dz
/* (non-Javadoc) 1S:H!h3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :9Pqy pd+
*/ Fu$sfq
public void sort(int[] data) { 'P#I<?vB
MaxHeap h=new MaxHeap(); 9nE%r\H
h.init(data); 5hMiCod
for(int i=0;i h.remove(); )j'b7)W\
System.arraycopy(h.queue,1,data,0,data.length); &IYkeGQr
} 0 CS_-
{5h_$a!TaU
private static class MaxHeap{ (%Rs&/vU~
~fe0Ba4
void init(int[] data){ 3Y8 V?* 1|
this.queue=new int[data.length+1]; Z#04 ]
for(int i=0;i queue[++size]=data; Tw5BvB1
fixUp(size); 4r*6fJ*bJ
} cS"6%:hQ
} ZHJzh\?
aXagiz\;
private int size=0; x!+a,+G
-j,o:ng0
private int[] queue; }1wuH
I_rVeMw=
public int get() { VbYapPu4b!
return queue[1]; _?"J.i
} yrX]w3kr%
Lsdu:+-
public void remove() { j>iM(8`t1
SortUtil.swap(queue,1,size--); T5h[{J^
fixDown(1); =Sq7U^(>
} y8@!2O4
file://fixdown `UR.Rn/x
private void fixDown(int k) { cg5DyQ(
int j; `g~-5Z~J
while ((j = k << 1) <= size) { AXCJFqk;
if (j < size %26amp;%26amp; queue[j] j++; J,7\/O(`A
if (queue[k]>queue[j]) file://不用交换 vY6|V$
break; :?J$ +bm}
SortUtil.swap(queue,j,k); 'e@}N)IX
k = j; 'Vd>"ti
} ?)&TewP
} vKeK]
private void fixUp(int k) { ?kSs7e>
while (k > 1) { /<@tbZJ*8
int j = k >> 1; !IS,[
if (queue[j]>queue[k]) c LJCLKJ
break; 'zaB5d~l
SortUtil.swap(queue,j,k); ;b^@o,=
k = j; e_I 8Jj4
} ]rS+v^@QH
} C1J'. !
-_3.]o/J
} b%BwGS(z
:vjbuqN]
} {~SR>I3sv
y[cAU:P?
SortUtil： ~EBZlTN
*K;~V
package org.rut.util.algorithm; 2+.m44>Ti
z!%}0
import org.rut.util.algorithm.support.BubbleSort; IYWD_}_ $
import org.rut.util.algorithm.support.HeapSort; A{QS+fa/
import org.rut.util.algorithm.support.ImprovedMergeSort; 19S,>
import org.rut.util.algorithm.support.ImprovedQuickSort; x^"OH
import org.rut.util.algorithm.support.InsertSort; @;0Ep0[
import org.rut.util.algorithm.support.MergeSort; -3fvO~
import org.rut.util.algorithm.support.QuickSort; P1kd6]s
import org.rut.util.algorithm.support.SelectionSort; [,dsVd
import org.rut.util.algorithm.support.ShellSort; :MVD83?4
a'Z"Yz^Eo
/** ktCh*R[`
* @author treeroot ~VOmMw4HV
* @since 2006-2-2 G4i&:0
* @version 1.0 < 5ow81
*/ .XmD[=
public class SortUtil { :X^B1z3X4
public final static int INSERT = 1; tua+R_"
public final static int BUBBLE = 2; Ii)TCSt9U?
public final static int SELECTION = 3; wv<"W@& 9
public final static int SHELL = 4; XxIUB(.QI
public final static int QUICK = 5; 7Q`4*H6
public final static int IMPROVED_QUICK = 6; wcO+P7g
public final static int MERGE = 7; ,Y*f]
public final static int IMPROVED_MERGE = 8; &^EkM
public final static int HEAP = 9; X7G6y|4;w
,O2F}5|;
public static void sort(int[] data) { ;23F8M%wH
sort(data, IMPROVED_QUICK); -+L1Hid.7
} ,MLPVDN*D
private static String[] name={ G~JQcJFj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l$FHL2?Cp
}; it.l;L_nW
`27? f$,
private static Sort[] impl=new Sort[]{ Kl*##qw!
new InsertSort(), 9u9#&xx
new BubbleSort(), "x{S3v4Rb5
new SelectionSort(), /4|qfF3
new ShellSort(), FUDMaI
new QuickSort(), G -;Yua2\
new ImprovedQuickSort(), ]?kf;A@
new MergeSort(), ':Te#S
new ImprovedMergeSort(), Cc^t&Eg
new HeapSort() Po2YDj`
}; !} 1p:@
P=h2Z,2
public static String toString(int algorithm){ = *sP, 6
return name[algorithm-1]; a7+BAma<
} <Z vG&
=q._Qsj?fu
public static void sort(int[] data, int algorithm) { o5)U3U1|
impl[algorithm-1].sort(data); A`@we
} f.,-KIiF
4U((dx*m
public static interface Sort { ?.T=(-
public void sort(int[] data); ?D.]c;PR
} 3}H94H)]a
!u^(<.xJ
public static void swap(int[] data, int i, int j) { k8h$#@^
int temp = data; OvFZ&S[
data = data[j]; O6`@'N>6P
data[j] = temp; *P_TG"^{W
} -X |G
} 43/|[