[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; B(5>H2
} ,}"jiGgS4
int i1=l; g/\cN(X
int i2=mid+1; g#Ta03\
for(int cur=l;cur<=r;cur++){ z@V9%xF-3
if(i1==mid+1) 3N|6?'m
data[cur]=temp[i2++]; jSRi
else if(i2>r) wh2E$b(-
data[cur]=temp[i1++]; mdo$d-d&
else if(temp[i1] data[cur]=temp[i1++]; VE1j2=3+o
else bI_MF/r''
data[cur]=temp[i2++]; K V
} 'KT(;Vof
} k#7A@Vb
>oaL-01i
} ^HtB!Xc
@8+v6z
改进后的归并排序: O: #SjjK
)[r=(6?n
package org.rut.util.algorithm.support; ~*UY[!+4^=
DsD? &:
import org.rut.util.algorithm.SortUtil; F%af05L[
-_eG/o=M
/** k g Rys
* @author treeroot ):}A Quy]
* @since 2006-2-2 8OO[Le]1
* @version 1.0 WwWCNN~}
*/ O6ugN-d>
public class ImprovedMergeSort implements SortUtil.Sort { &%8IBT
H*+7{;$
private static final int THRESHOLD = 10; t7sEY
[Fv,`*/sm
/* ^tI&5S]nE
* (non-Javadoc) jUgx ;=
* fny6`_O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t}?-ao
*/ &A`,hF8
public void sort(int[] data) { G007[|
int[] temp=new int[data.length]; t5u#[*
mergeSort(data,temp,0,data.length-1); mZmEE2h
} 7zJ2n/`m*
+dRRMyxe4
private void mergeSort(int[] data, int[] temp, int l, int r) { DlAwB1Ak
int i, j, k; pjFj{
int mid = (l + r) / 2; F- u"zox
if (l == r) <*-8E(a
return; pG"hZB3)
if ((mid - l) >= THRESHOLD) hY!>>
mergeSort(data, temp, l, mid); l~Ka(*[!U
else 25 :vc0
insertSort(data, l, mid - l + 1); XW@C_@*J
if ((r - mid) > THRESHOLD) "r3h+(5
mergeSort(data, temp, mid + 1, r); yLK %lP
else 3Co1bY:
insertSort(data, mid + 1, r - mid); HDKY7Yr
csxn"Dz\
for (i = l; i <= mid; i++) { Wm5[+z|2?9
temp = data; {;zHkmx
} |W@Ko%om
for (j = 1; j <= r - mid; j++) { rKdsVW
temp[r - j + 1] = data[j + mid]; ; C(5lD&\5
} _`0DO4IU
int a = temp[l]; UQ7La 7"
int b = temp[r]; 0Zo><=
for (i = l, j = r, k = l; k <= r; k++) { w(t1m]pF[
if (a < b) { a|#pl!
data[k] = temp[i++]; 5MZv!N
a = temp; 8>D*U0sNl
} else { >i.$s
data[k] = temp[j--]; !|]k2=+I
b = temp[j]; 8*&73cp
} BI<9xl]a
} FeQo,a
} |TkicgeS
!r/~D |
/** R!WDQGR(2
* @param data |ITb1O`_P
* @param l cfg.&P>
* @param i )1R[X!KQ7
*/ $ndBT+i
private void insertSort(int[] data, int start, int len) { QtWe,+WWV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _5O~]}
} D!Nc&|X^
} !W0JT#0
} E?|NYu#I6
} ="%887e
U2vb&Qu/
堆排序： (b&Z\?"
l[m*csDk"
package org.rut.util.algorithm.support; 3pL4Zhf
Gv }
import org.rut.util.algorithm.SortUtil; sCQV-%9
AeN:wOm
/** $vYy19z
* @author treeroot QQS"K g
* @since 2006-2-2 /Dt:4{aTOC
* @version 1.0 {TMng&
*/ B4+u/hkbh?
public class HeapSort implements SortUtil.Sort{ *8yC6|wL?
Z("N *`VP;
/* (non-Javadoc) B,Tv9(sv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NiE`u m
*/ !bnnUCTb\
public void sort(int[] data) { US-f<Wq
MaxHeap h=new MaxHeap(); g/P1lQ)
h.init(data); D;+Y0B
for(int i=0;i h.remove(); -ik((qx_
System.arraycopy(h.queue,1,data,0,data.length); l 6aD3?8LN
} oY,{9H37b
?@`5^7*
private static class MaxHeap{ ",,.xLI7
:6EX-Xyj
void init(int[] data){ k+je-%hPj
this.queue=new int[data.length+1]; "SWL@}8vx
for(int i=0;i queue[++size]=data; .RmoO\ ,Gm
fixUp(size); (I>SqM Y
} d.B<1"MQ
} US9@/V*2
~Hj c?*
private int size=0; hjk]?MC
yOb']
private int[] queue; xt`a":lru
SNSoV3|k-
public int get() { * 0JF|'
return queue[1]; 5bI4' ;
} "@5{=
@$$J}~{
public void remove() { k][{4~z
SortUtil.swap(queue,1,size--); r(wtuD23q
fixDown(1); bS55/M w
} EKsOj&ZiJ
file://fixdown 3!#FG0Z
private void fixDown(int k) { <dBz]W
int j; {cdrMP@""
while ((j = k << 1) <= size) { @j%@Z
if (j < size %26amp;%26amp; queue[j] j++; _)3C_G1!
if (queue[k]>queue[j]) file://不用交换 j-FMWEp
break; iF.f*3-NJB
SortUtil.swap(queue,j,k); o`'4EVw*
k = j; $!z.[GL
} H{EZ} *{M4
} jC?l :m?
private void fixUp(int k) { ozHL'H
while (k > 1) { 8/ukzY1!
int j = k >> 1; As tuM]
if (queue[j]>queue[k]) XZ(<Mo\v
break; jgkY^l
SortUtil.swap(queue,j,k); vJx( lU`Y
k = j; j[t2Bp
} _l,-SQgj
} {sq:vu@NC
Lo}/k}3Sx
} b1."mT!p
Uhyf
} p2+K-/}ApP
[w+1<ou;j
SortUtil： "Z dI~
I:MrX
package org.rut.util.algorithm; @bnw$U`+
YNp-A.o W@
import org.rut.util.algorithm.support.BubbleSort; 0B~x8f
import org.rut.util.algorithm.support.HeapSort; ##1/{9ywy
import org.rut.util.algorithm.support.ImprovedMergeSort; 4"^W/Zo
import org.rut.util.algorithm.support.ImprovedQuickSort; : 'jVA
import org.rut.util.algorithm.support.InsertSort; X%7l! k[
import org.rut.util.algorithm.support.MergeSort; 7+6I~&x!Lz
import org.rut.util.algorithm.support.QuickSort; uY3#,
import org.rut.util.algorithm.support.SelectionSort; P4E_<v[
import org.rut.util.algorithm.support.ShellSort; w2r*$Q
2xBh
/** '68#7Hs.
* @author treeroot ^ $N3.O.
* @since 2006-2-2 MY(51)*
* @version 1.0 #wh[F"zX
*/ ,E+\SBQS_
public class SortUtil { C]na4yE8
public final static int INSERT = 1; 9'ky2 ]w
public final static int BUBBLE = 2; -Gm}i8;
public final static int SELECTION = 3; NZwi3
public final static int SHELL = 4; VQ+G.
public final static int QUICK = 5; A\.{(,;kp
public final static int IMPROVED_QUICK = 6; [Qqss8a
public final static int MERGE = 7; `vf]C'
public final static int IMPROVED_MERGE = 8; 8>X]wA6q
public final static int HEAP = 9; 1ZvXRJ)%
)cm^;(#pV
public static void sort(int[] data) { =>GGeEL
sort(data, IMPROVED_QUICK); #X?E#^6?E
} b~TTz`HZ
private static String[] name={ ~cfvL*~5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SxX
}; OgCNqW d-
mZjP;6
private static Sort[] impl=new Sort[]{ RgzzbW
new InsertSort(), >;fn,9w
new BubbleSort(), G P '-
new SelectionSort(), RiIafiaD
new ShellSort(), }CrWmJu0
new QuickSort(), t ^1uj:vD
new ImprovedQuickSort(), (:}}p}u
new MergeSort(), xhMAWFg|
new ImprovedMergeSort(), $ao7pvU6
new HeapSort() c/Li,9cT'
}; `SS[[FT$>
!d95gq<=>
public static String toString(int algorithm){ bj?=\u
return name[algorithm-1]; r(zn1;zl
} FrV8_[
x l=i_
public static void sort(int[] data, int algorithm) { NA#,q 8
impl[algorithm-1].sort(data); yFTN/MFt
} 6E_YUk?KW
e&NJj:Ph*
public static interface Sort { =L{-Hu/j
public void sort(int[] data); pK0@H"$8
} gYmO4/c,
-NA2+].
public static void swap(int[] data, int i, int j) { o ethO
int temp = data; q/qig5Ou
data = data[j]; H,LJ$ py
data[j] = temp; ,!P}Y[|
} JX#0<U|L
} s$^2Qp