[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; p/ au.mc
} hOM#j
int i1=l; pT<}n 9yB5
int i2=mid+1; <!a%GI
for(int cur=l;cur<=r;cur++){ ,/Al'
if(i1==mid+1) ]&_z@Z.i
data[cur]=temp[i2++]; 2*pNIc
else if(i2>r) 8dlhL8#
data[cur]=temp[i1++]; k`=&m"&#
else if(temp[i1] data[cur]=temp[i1++]; Z"N}f ,
else M-zqD8D
data[cur]=temp[i2++]; I*EHZctH
} tk66Ggi[K
} d 6=Z=4w
q vGP$g
} |wkUnn4UB8
'tJ@+(tqw
改进后的归并排序: g93Hl&
;dquld+q
package org.rut.util.algorithm.support; PwS7!dzH-
LPS]TG\
import org.rut.util.algorithm.SortUtil; 0I7 r{T
KvNw'3Ua
/** fDrjR6xV
* @author treeroot 3)3$ L
* @since 2006-2-2 7CSd}@71\
* @version 1.0 R=<uf:ca
*/ ~mk>9Gp
public class ImprovedMergeSort implements SortUtil.Sort { #sb@)Q
bq"dKN`
private static final int THRESHOLD = 10; ;GZ/V;S
Z3N^)j8
/* HC>MCwx=r
* (non-Javadoc) !"bU|a
* ,A;wLI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &b=OT%D~FU
*/ gn6@x
public void sort(int[] data) { #OVS]Asn}
int[] temp=new int[data.length]; pg/SYEvsV
mergeSort(data,temp,0,data.length-1); n7iIY4gZ
} ]_mcJ/6:
9IJc9Sv(
private void mergeSort(int[] data, int[] temp, int l, int r) { 25/M2u?
int i, j, k; :0vKt 6>Sp
int mid = (l + r) / 2; )5Ofr-Y
if (l == r) bI+ TFOP
return; f_;6uCCO
if ((mid - l) >= THRESHOLD) 1aS66TS3
mergeSort(data, temp, l, mid); +.IncY8C$
else f6JC>Np
insertSort(data, l, mid - l + 1); /m8&E*+T1
if ((r - mid) > THRESHOLD) K yDPD'
mergeSort(data, temp, mid + 1, r); *s (L!+
else 3$h yV{
insertSort(data, mid + 1, r - mid); YV)h"u+@0
lj"72
for (i = l; i <= mid; i++) { v<V9Z <ub
temp = data; V[avV*;3i
} ;)'
for (j = 1; j <= r - mid; j++) { {/q4W; D
temp[r - j + 1] = data[j + mid]; +dJLT}I8M
} +|6 u 0&R^
int a = temp[l]; 7|^5E*8/
int b = temp[r]; D0 ,t,,L
for (i = l, j = r, k = l; k <= r; k++) { J:G~9~V^
if (a < b) { S*S@a4lV7
data[k] = temp[i++]; u8Oo@xf0Fr
a = temp; U_ *K%h\m
} else { 3#~w#Q0%
data[k] = temp[j--]; W'f)W4D$6
b = temp[j]; 7(]M`bBH
} ]_y0wLq
} Iv51,0A
} m$80D,3
faPgp
/** GCv*a[8?n
* @param data mH5[(?
* @param l fSw6nEXn
* @param i Jpr`E&%I6
*/ 6/l{e)rX2o
private void insertSort(int[] data, int start, int len) { RinaGeim
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zjUT:#(k
} 3FE=?Q
} 3p#BEH<re
} 7$|L%Sk
} 6*%E4#4
y3Lq"?h
堆排序： 2qe]1B;
|!\5nix3A>
package org.rut.util.algorithm.support; I'a&n}jx
P=PVOt@ b
import org.rut.util.algorithm.SortUtil; ~-K<gT/
XpoEZ|0
/** ,'^^OLez
* @author treeroot 8w L%(p
* @since 2006-2-2 xe9V'wICp(
* @version 1.0 JF-ew"o<E
*/ Ph/!a6y
public class HeapSort implements SortUtil.Sort{ #SIIhpjA(
H*VZ&{\7
/* (non-Javadoc) ?*: mR|=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1-:{&!
*/ o}VW%G"
public void sort(int[] data) { O\ph!?L
MaxHeap h=new MaxHeap(); 9w08)2$Na
h.init(data); v+qHH8
for(int i=0;i h.remove(); =b[q<p\
System.arraycopy(h.queue,1,data,0,data.length); oH]"F
} HqKI|^
8>l#F<@5
private static class MaxHeap{ 3 V{&o,6
GjGt' m*
void init(int[] data){ XX;MoE~MM
this.queue=new int[data.length+1]; Q~S3d
for(int i=0;i queue[++size]=data; 6$_//
fixUp(size); 6O# xV:Uc<
} FNB4YZ6
} h Lv_ER?
1@p'><\
private int size=0; )EptyH
jg+q{ ^
private int[] queue; W^Z#_{
Hb|y`Ok
public int get() { $9m>(b/;n
return queue[1]; $TR#-q
} t$yt8#Tk
WEVV2BJ
public void remove() { ^DWhIxBh
SortUtil.swap(queue,1,size--); +(qs{07A$
fixDown(1); y4Fuh nb>
} "? t@Y
file://fixdown * M,'F^E2
private void fixDown(int k) { p:@JCsH=
int j; 6Lhfb\2?
while ((j = k << 1) <= size) { wS%aN@ay3
if (j < size %26amp;%26amp; queue[j] j++; ^ua8Ya
if (queue[k]>queue[j]) file://不用交换 7m+d;x2
break; q;0QI{:5v
SortUtil.swap(queue,j,k); byB ESyV!O
k = j; g9K7_T #W
} 4~YPLu
} Z;4pI@u
private void fixUp(int k) { L4?)N&V
while (k > 1) { P6 & _q
int j = k >> 1; s`E^1jC
if (queue[j]>queue[k]) ;\[el<Y)s
break; XBF]|}%
SortUtil.swap(queue,j,k); 1p|}=R
k = j; JZM:R
} pz]T9ol~
} :2_8.+:
%e,X7W`'2
} lmjoSINy
M^twD*
} G*x"drP
aO'lk
SortUtil： @ a?^2X^
%/r}_V(UN
package org.rut.util.algorithm; ?!$uMKyt
,&X7D]
import org.rut.util.algorithm.support.BubbleSort; t:?8I9d
import org.rut.util.algorithm.support.HeapSort; H*M)<"X
import org.rut.util.algorithm.support.ImprovedMergeSort; !0+!%Nr>J
import org.rut.util.algorithm.support.ImprovedQuickSort; 6IyD7PQ
import org.rut.util.algorithm.support.InsertSort; 5`?'}_[Yj
import org.rut.util.algorithm.support.MergeSort; 6)B6c. 5o
import org.rut.util.algorithm.support.QuickSort; LQs>[3rK
import org.rut.util.algorithm.support.SelectionSort; O=Cz*j
import org.rut.util.algorithm.support.ShellSort; ?z]hYsy
;jEDGKLq
/** }hPFd
* @author treeroot ,( ?q
* @since 2006-2-2 qek[p_7
* @version 1.0 D0f.XWd
*/ V&75n.L
public class SortUtil { `?H yDny
public final static int INSERT = 1; :"pA0oB
public final static int BUBBLE = 2; ,iQRf@#W_b
public final static int SELECTION = 3; uN)o|7
public final static int SHELL = 4; 6zGM[2
public final static int QUICK = 5; +v7mw<6s
public final static int IMPROVED_QUICK = 6; fA k]]PU
public final static int MERGE = 7; #_b U/rk)*
public final static int IMPROVED_MERGE = 8; ?^< E#2a
public final static int HEAP = 9; c[I4'x
FYs-vW{
public static void sort(int[] data) { <+tSTc4>r
sort(data, IMPROVED_QUICK); l; ._ ?H
} T|{1,wP
private static String[] name={ &H`AS6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S-$N!G~!
}; \:To>A32
$z>L $,c>
private static Sort[] impl=new Sort[]{ b,8\i|*!f
new InsertSort(), gC+PpY#2h
new BubbleSort(), ]hPu
new SelectionSort(), %)|pUa&
new ShellSort(), Lcx)wof
new QuickSort(), Bv)^GU&
new ImprovedQuickSort(), r^m8kYezQ
new MergeSort(), zree}VqD;5
new ImprovedMergeSort(), O_M2Axm
new HeapSort() j!It1B
}; !m* YPY31
$hn=MOMc
public static String toString(int algorithm){ E=-ed9({:
return name[algorithm-1]; 7j ]d{lD
} t8}R?%u
q$|Wxnz
public static void sort(int[] data, int algorithm) { *u i!|;
impl[algorithm-1].sort(data); I:ag}L8`
} _5nS!CN
*Va;ra(V2
public static interface Sort { Hz*5ZIw
public void sort(int[] data); eNwF<0}
} i; qb\
4Pbuv6`RK
public static void swap(int[] data, int i, int j) { kXfTNMb
int temp = data; 6cF~8
data = data[j]; Cj,Yy
data[j] = temp; {Tps3{|wt
} W7F1o[
} p>g5WebBN