[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; -ah)/5j
} S:Jg#1rww-
int i1=l; !`4ie
int i2=mid+1; 1RX-`"^+
for(int cur=l;cur<=r;cur++){ Iz83T9I&
if(i1==mid+1) Q`6hJgyL
data[cur]=temp[i2++]; ~l?c.CSd
else if(i2>r) N$v_z>6Z
data[cur]=temp[i1++]; _L` uCjA
else if(temp[i1] data[cur]=temp[i1++]; >mpNn
else m+:JNgX6
data[cur]=temp[i2++]; :-<30LS$
} nqx0#_K-E
} 63_#*6Pv28
x7G)^
} 7=yjd)Iy9m
w^^l,
改进后的归并排序: ,3iD/8_
]Hq,Pr_+
package org.rut.util.algorithm.support; akPd#mf
Iw`|,-|
import org.rut.util.algorithm.SortUtil; N 3O!8A_
_?y3&4N)
/** \ltS~EuWU
* @author treeroot xLLTp7b(
* @since 2006-2-2 {T,}]oX
* @version 1.0 US^%pd
*/ 3-6MGL9
public class ImprovedMergeSort implements SortUtil.Sort { [` }w7
{O).!
private static final int THRESHOLD = 10; 2L[!~h2
0VNpd~G$
/* gR gB= C{
* (non-Javadoc) c`hENPhW
* #8 ^b]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7HY8 F5Brx
*/ w|6?A-
public void sort(int[] data) { L[<Y6u>m!1
int[] temp=new int[data.length]; BNA1"@9q
mergeSort(data,temp,0,data.length-1); xdDe@G;"
} ~% t'}JDZ
0_-o]BY
private void mergeSort(int[] data, int[] temp, int l, int r) { ?(Tin80=r
int i, j, k; W1Fhx`
int mid = (l + r) / 2; y`5 ?
if (l == r) JUj.:n2e
return; YU`k^a7%
if ((mid - l) >= THRESHOLD) K>LS8,8V
mergeSort(data, temp, l, mid); .iP>?9$f"
else e-UWbn'~
insertSort(data, l, mid - l + 1); )*6
if ((r - mid) > THRESHOLD) #H4<8B
mergeSort(data, temp, mid + 1, r); a5O$he
else 0H.bRk/P+
insertSort(data, mid + 1, r - mid); kka{u[ruA
$;}@2U
for (i = l; i <= mid; i++) { 0-aaLC~Z>
temp = data; #O,w{S
} !};Ll=dz
for (j = 1; j <= r - mid; j++) { J7oj@Or9
temp[r - j + 1] = data[j + mid]; hR:i!
} _A& [rBm|
int a = temp[l]; " W{rS4L
int b = temp[r]; +t1+1Zv
for (i = l, j = r, k = l; k <= r; k++) { QmGK! H>3
if (a < b) { l Le&q
data[k] = temp[i++]; "'+C%
a = temp; d(d3@b4Ta
} else { U(x$&um(l
data[k] = temp[j--]; y!:vX6l
b = temp[j]; zFipuG02
} vN@04a\h
} ]]`[tVaFr
} <0hVDk~
g`C"t3~%S
/** =B'Yx
* @param data $G}k'[4C
* @param l z#|Auc0
* @param i lX/7
*/ hCc%d$wVk
private void insertSort(int[] data, int start, int len) { x*tCm8`{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .YH#+T'
} =w8 0y'
} w)qmq
} K.&6c,P]
} 6Fk[wH7
BT;1"l<
堆排序： w8cnSO
U8HuqFC
package org.rut.util.algorithm.support; tj8o6N#
;}KJ[5i-V
import org.rut.util.algorithm.SortUtil; 4AvIU!0w
TV_a(#S
/** =>Z4vWX*
* @author treeroot Sx Bo%
* @since 2006-2-2 ;0$qT$,
* @version 1.0 )' ,dP)b
*/ -`Zk`s|!
public class HeapSort implements SortUtil.Sort{ =%>E8)Jb
<&B]p
/* (non-Javadoc) Rf>V]R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rTJU)4I^h
*/ $ntC{a>&
public void sort(int[] data) { v$q\3#5|'
MaxHeap h=new MaxHeap(); <; Td8O89_
h.init(data); qT4`3nH:
for(int i=0;i h.remove(); n[v`F
System.arraycopy(h.queue,1,data,0,data.length); JlE+CAny
} FOPmvlA\-<
H.l WHM+H4
private static class MaxHeap{ Po\+zZjo
A]o3MoSt
void init(int[] data){ 8F)9.s,*
this.queue=new int[data.length+1]; {\VsM#K6
for(int i=0;i queue[++size]=data; 6 W$m,3Dg
fixUp(size); c^&:':Z%'
} {S%;By&[
} KM^}d$x}s
-%[6q
private int size=0; K&=6DvfR
]^a{?2ei
private int[] queue; KO}TCa
JE$$6X
public int get() { ]i `~J
return queue[1]; ,s@S`KS0
} chE}`I?
P;&U3i
public void remove() { NX]6RZr-
SortUtil.swap(queue,1,size--); SokU9n!
fixDown(1); 3rX8H`R
} `@:k*d
file://fixdown ,S, R6#3G
private void fixDown(int k) { V|nJ%G\
int j; q^@*k,HG
while ((j = k << 1) <= size) { {w99~?
if (j < size %26amp;%26amp; queue[j] j++; y>g`R^^
if (queue[k]>queue[j]) file://不用交换 1gYvp9Ma
break; :ZM=P3QZ
SortUtil.swap(queue,j,k); ]tbl1=|
k = j; }k8&T\V!
} wG22ffaki
} oOQ0f |MGp
private void fixUp(int k) { ]ddL'>$c$
while (k > 1) { :?#wWF.
int j = k >> 1; 0J= $ A
if (queue[j]>queue[k]) BT5~MYBl
break; kh>i#9Ie
SortUtil.swap(queue,j,k); k.H4Mf(4
k = j; C\cZ
} zfGr1;
} a-5#8
gGbqXG^
} u)P)r,
`M_w^&6+n
} |X~vsM0
VZA>ErB
SortUtil： "fd'~e$S#
7{f{SIB
package org.rut.util.algorithm; Psjk 7\
tZD^<Q7}\
import org.rut.util.algorithm.support.BubbleSort; Lez]{%+.`[
import org.rut.util.algorithm.support.HeapSort; ` B+Pl6l)F
import org.rut.util.algorithm.support.ImprovedMergeSort; Pj*"2 LBW#
import org.rut.util.algorithm.support.ImprovedQuickSort; -9"[/
import org.rut.util.algorithm.support.InsertSort; (i^<er q
import org.rut.util.algorithm.support.MergeSort; k,[[ CZ0j
import org.rut.util.algorithm.support.QuickSort; FWyfFCK
import org.rut.util.algorithm.support.SelectionSort; `SYq/6$VEH
import org.rut.util.algorithm.support.ShellSort; 7)Bizlf
CH=k=)() ]
/** [8`^_i=#
* @author treeroot ery{>|k
* @since 2006-2-2 28xLaob
* @version 1.0 xEe3,tb'e
*/ 3:!5 ]
public class SortUtil { ]LSlo593
public final static int INSERT = 1; 0 9*?'^s4
public final static int BUBBLE = 2; TJ(vq]|&
public final static int SELECTION = 3; Hb9r.;r<EW
public final static int SHELL = 4; 'jU;.vZex
public final static int QUICK = 5; v;R+{K87
public final static int IMPROVED_QUICK = 6; 0 aiE0b9c
public final static int MERGE = 7; T7XbbU
public final static int IMPROVED_MERGE = 8; D4QLlP
public final static int HEAP = 9; A4VVy~sd
zLVk7u{e
public static void sort(int[] data) { =xHzhh
sort(data, IMPROVED_QUICK); K6oQx)|
} A)o%\j
private static String[] name={ f<2<8xS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G%fNGQwT
}; xy<)zKp
\F),SL
private static Sort[] impl=new Sort[]{ _~E_#cNn
new InsertSort(), 0Y ld!L
new BubbleSort(), (k5d.E]CK
new SelectionSort(), k|_LF[*Z
new ShellSort(), ^9*Jz{e
new QuickSort(), SV_b(wP9
new ImprovedQuickSort(), )'t&LWS~
new MergeSort(), @?<1~/sfL
new ImprovedMergeSort(), 7.1FRxS
new HeapSort() )m$i``*<
}; C]%}L%,
o_%gFV[q
public static String toString(int algorithm){ 'tzN.p1O
return name[algorithm-1]; q8fnUK?i
} l#%G~c8x
*Y9'tHI
public static void sort(int[] data, int algorithm) { MG0d&[
impl[algorithm-1].sort(data); ^o6&|q
} jD'$nKpg
W q>qso
public static interface Sort { -VRKQNT
public void sort(int[] data); #jR1ti)p
} Ng<oz*>U
H}&4#CQ'!
public static void swap(int[] data, int i, int j) { TY*q[AWG
int temp = data; &+F}$8,
data = data[j]; \"hP*DJ"
data[j] = temp; r#'E;Yx
} eWAgYe2
} BZWGXzOFh