[JAVA]用Java实现的各种排序

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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; HzV3O-Qz]
} K7|BXGL8r8
int i1=l; 6;Bqu5_Cj
int i2=mid+1; %5b2vrg~*
for(int cur=l;cur<=r;cur++){ N]3XDd|q
if(i1==mid+1) d}1R<Q;F
data[cur]=temp[i2++]; tG'c79D\
else if(i2>r) bLg1Dd7Q
data[cur]=temp[i1++]; kjH0u$n
else if(temp[i1] data[cur]=temp[i1++]; C.eZcNJG
else b$hQB090
data[cur]=temp[i2++]; tlE+G@|^
} !"Kg b;A
} V<b"jCXI
n,`&f~tap
} tq{ aa
w;XXjT
改进后的归并排序: ffdyDUzQ
z' @F@k6
package org.rut.util.algorithm.support; opKtSF|)
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import org.rut.util.algorithm.SortUtil; Hly$ Wm
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/** ~%cbp&s*/q
* @author treeroot E$gcd#rT
* @since 2006-2-2 9i n&\
* @version 1.0 b1-JnEc
*/ =KkHck33
public class ImprovedMergeSort implements SortUtil.Sort { a4?:suX$
P:=3;d{v
private static final int THRESHOLD = 10; J^U#dYd
*g7dB2{
/* $%LjIeVA5
* (non-Javadoc) X=lOwPvP
* mDtD7FzJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t<rhrW75P
*/ vO 3fAB
public void sort(int[] data) { Ef69]{E
int[] temp=new int[data.length]; ) b?HK SqI
mergeSort(data,temp,0,data.length-1); (V*ggii@
} M^a QH/=:"
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private void mergeSort(int[] data, int[] temp, int l, int r) { P'[w9'B
int i, j, k; u>}k+8~
int mid = (l + r) / 2; Eg>MG87
if (l == r) _jp8;M~Z
return; F9N)UW:w
if ((mid - l) >= THRESHOLD) M%Ov6u<I8
mergeSort(data, temp, l, mid); tT'+3
else aB.`'d)V
insertSort(data, l, mid - l + 1); 7cH[}v`pn
if ((r - mid) > THRESHOLD) %c):^;6p
mergeSort(data, temp, mid + 1, r); ]*?qaIdqu
else Ao2t=vg
insertSort(data, mid + 1, r - mid); $5l8V
VUk2pEGO.
for (i = l; i <= mid; i++) { in$Pk$ c
temp = data; X2~>Z^, U
} *:wu{3g}M`
for (j = 1; j <= r - mid; j++) { 0Db#W6*^
temp[r - j + 1] = data[j + mid]; *G^QS"%
} Drz#D1-2
int a = temp[l]; Z':}ZXy]
int b = temp[r]; - 3kg,=HU;
for (i = l, j = r, k = l; k <= r; k++) { 4Y[tx]<
if (a < b) { !h4L_D0
data[k] = temp[i++]; mJl|dk_c
a = temp; qlO(z5Ak
} else { Z8Qmj5'[
data[k] = temp[j--]; Ry8@U9B6,t
b = temp[j]; l:%4@t`
} |\J8:b>}
} w`q):yXX
} wjDLsf,
f3h^R20qmO
/** 5#~u U
* @param data vzG(u_,9[
* @param l 6Dwj^e0
* @param i _Uc le
*/ Srg`Tt]
private void insertSort(int[] data, int start, int len) { v[\' M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wS9EC}s:Q
} g^/
} 3+rud9T
} 6"b =aPTi
} @Pb!:HeJE
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堆排序： f 0D9Mp
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package org.rut.util.algorithm.support; k%Jv%m}aB
Mt"j< ]EW
import org.rut.util.algorithm.SortUtil; C;QIp6"1
0x*L"HD
/** _gxI=EYi
* @author treeroot F6`$5%$M;?
* @since 2006-2-2 8K=sx@l
* @version 1.0 1--_E,Su>
*/ x8+W9i0[1
public class HeapSort implements SortUtil.Sort{ v@(Y:\>
,onOwPz
/* (non-Javadoc) fL>>hBCqC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fO|oV0Rw
*/ )5Mf,
public void sort(int[] data) { *EY^t=
MaxHeap h=new MaxHeap(); d2Pqi* K
h.init(data); 9)}Nx>K
for(int i=0;i h.remove(); vau0Jn%=ck
System.arraycopy(h.queue,1,data,0,data.length); 3Uw}!>`%
} {a;my"ly
JI##l:,7r
private static class MaxHeap{ R-5EztmLae
XpFW(v
void init(int[] data){ ;n0VF77>O
this.queue=new int[data.length+1]; h2<Y*j
for(int i=0;i queue[++size]=data; JL.noV3q$
fixUp(size); =wE1j
} qn=~4rg]R
} I*hCIy#;
+X#JCLD
private int size=0; Kw_> X&GcJ
[Vzp D 4
private int[] queue; FtHR.S=u
IY jt*p5
public int get() { rXgU*3RG
return queue[1]; b5NPG N
} >LS*G qjq
IWc?E
public void remove() { tj<a , l
SortUtil.swap(queue,1,size--); [Tmpj9!q
fixDown(1); `_M*2(rt
} XpS].P9
file://fixdown !} ~K'1"
private void fixDown(int k) { [ed6n@/O@
int j; %+0 7>/
while ((j = k << 1) <= size) { A"ApWJ3
if (j < size %26amp;%26amp; queue[j] j++; &b~if}vcb
if (queue[k]>queue[j]) file://不用交换 x"7`,W
break; JWzN 'a R
SortUtil.swap(queue,j,k); ] /w:5o#
k = j; w=Cqv~
} /1OzX'5f
} JzI/kH~
private void fixUp(int k) { l.gt+e
while (k > 1) { c0}* $e
int j = k >> 1; =GGt:3Kx-
if (queue[j]>queue[k]) I#?NxP\S
break; u^5X@.
SortUtil.swap(queue,j,k); 98"/]ERJ
k = j; iPoh2
} n^kszIu~
} Y367Jr@^N
EkWipF(
} Wg\`!T
c:>&iB-Yu
} ZoFQJJK56B
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SortUtil： YI0ubB
3"9'MDKH
package org.rut.util.algorithm; GP|G[
ur*@TIvD
import org.rut.util.algorithm.support.BubbleSort; (`nn\)
import org.rut.util.algorithm.support.HeapSort; 35>VCjCw0
import org.rut.util.algorithm.support.ImprovedMergeSort; Ro1b (+H
import org.rut.util.algorithm.support.ImprovedQuickSort; ea7l:(C
import org.rut.util.algorithm.support.InsertSort; <S/`-/=2
import org.rut.util.algorithm.support.MergeSort; LY>-kz]
import org.rut.util.algorithm.support.QuickSort; 8~q%H1[I\N
import org.rut.util.algorithm.support.SelectionSort; ;ndsq[k>
import org.rut.util.algorithm.support.ShellSort; <Vu/6"DP
z^xrB$8 u
/** cU`sA_f
* @author treeroot n+Bh-aV
* @since 2006-2-2 fYv= yP~
* @version 1.0 gt~hUwL
*/ _DlkTi5(w
public class SortUtil { 4|PNsHXt
public final static int INSERT = 1; \*24NB
public final static int BUBBLE = 2; 1lAx"VL
public final static int SELECTION = 3; "'M>%m u
public final static int SHELL = 4; @#wBK3Ut^
public final static int QUICK = 5; Tno[LP,
public final static int IMPROVED_QUICK = 6; kaK0'l2%
public final static int MERGE = 7; G?`x$UU
public final static int IMPROVED_MERGE = 8; ]gxt+'iAFS
public final static int HEAP = 9; 8V]oR3'
?$:;hGO.<~
public static void sort(int[] data) { 7F=Xn@ _
sort(data, IMPROVED_QUICK); EKwA1,Xz
} x^s2bb
private static String[] name={ X}!r4<;(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !sbKJ+V7
}; HkgmZw,
'%k<? *
private static Sort[] impl=new Sort[]{ c_oI?D9
new InsertSort(), [;IW'cXNq
new BubbleSort(), <M//zXa
new SelectionSort(), EqY e.dF,
new ShellSort(), +}MV$X
new QuickSort(), H\BhAf
new ImprovedQuickSort(), gc%aaYf>
new MergeSort(), +W=
new ImprovedMergeSort(), q '6gj
new HeapSort() $M `%A
}; iGCA>5UE
A(!nT=0o
public static String toString(int algorithm){ "ZuhN(-`
return name[algorithm-1]; {|{}]B
} y(I_ 6+B^
]{` 8C
public static void sort(int[] data, int algorithm) { In%K
impl[algorithm-1].sort(data); W>ZL[BQ
} C&d%S|:IR
X<6Ro es2
public static interface Sort { co <ATx
public void sort(int[] data); ]6PX4oK_t
} A (:7q4
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public static void swap(int[] data, int i, int j) { je9eJUKE
int temp = data; q?Jd.r5*
data = data[j]; uydy[n\
data[j] = temp; 2(s+?n.N
} IV"OzQONx
} ^>?E1J3u