[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; =svN#q5s
} ~8+ Zs
int i1=l; wJqMa9|
int i2=mid+1; o/)h"i0P
for(int cur=l;cur<=r;cur++){ JR|ck=tq
if(i1==mid+1) >y>5#[M!
data[cur]=temp[i2++]; r;2^#6/Z
else if(i2>r) .Hm>i
data[cur]=temp[i1++]; >:!5*E5?
else if(temp[i1] data[cur]=temp[i1++]; /N.b%M]!
else pki%vRY
data[cur]=temp[i2++]; r5/0u(\LB
} T>Z<]s
} 0mVNQxHI
|r/" |`
} V0YZp
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改进后的归并排序: H?Wya.7
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package org.rut.util.algorithm.support; J;e2&gB
C) s5D
import org.rut.util.algorithm.SortUtil; 0+ '&`Q!u
}<r)~{UV
/** $PPi5f}HD
* @author treeroot Zi i
* @since 2006-2-2 7]bGc \
* @version 1.0 b|DdG/O
*/ 00y!K m_D
public class ImprovedMergeSort implements SortUtil.Sort { w9imKVry
q`-N7 ,$T
private static final int THRESHOLD = 10; 33q}CzK
^ @5QP$.
/* V!=,0zy~Z
* (non-Javadoc) 3d]S!=4H"
* J8(lIk:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &z3o7rif$
*/ 0d&6lqTo
public void sort(int[] data) { T -2t.Xs
int[] temp=new int[data.length]; aXYY:;
mergeSort(data,temp,0,data.length-1); 6gE7e|+
} Vb_4f"
R n[cW5Y<
private void mergeSort(int[] data, int[] temp, int l, int r) { am'7uy!ka~
int i, j, k; x9g#<2w8
int mid = (l + r) / 2; X_h}J=33Q
if (l == r) cT,sh~-x,
return; {tZ.v@
if ((mid - l) >= THRESHOLD) m s\}
mergeSort(data, temp, l, mid); {\5
else =T@1@w
insertSort(data, l, mid - l + 1); )10+@d
if ((r - mid) > THRESHOLD) <'*LRd$1
mergeSort(data, temp, mid + 1, r); ;^*W+,4WB
else "+s++@ z
insertSort(data, mid + 1, r - mid); GefTdO.&
D>q9 3;p
for (i = l; i <= mid; i++) { Otuf]B^s
temp = data; S\=Nn7"
} )t#W{Gzfmh
for (j = 1; j <= r - mid; j++) { a=2%4Wmz
temp[r - j + 1] = data[j + mid]; ##*3bDf$-5
} R 9\*#c
int a = temp[l]; +<C!U'
int b = temp[r]; K%oG,-wdg
for (i = l, j = r, k = l; k <= r; k++) { D,feF9
if (a < b) { bG#>uE J-
data[k] = temp[i++]; 5j(k:a+!H
a = temp; ~>|ziHx
} else { .q>iXE_c
data[k] = temp[j--]; C'x&Py/#
b = temp[j]; e"<OELA
} L0o\J` :
} GTd,n=
} .k !{*
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/** (<9u-HF#
* @param data ]=BB#
* @param l [W&T(%(W-
* @param i =^?/+p8k
*/ 4pvMd
private void insertSort(int[] data, int start, int len) { hgq;`_;1,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZECfR>`x
} qE"OB
} zDG b7S{
} z03K=aZ
} 9'B `]/L
|BXg/gW
堆排序： Zh~'9 JH
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package org.rut.util.algorithm.support; h376Be{P
guR/\z$D@C
import org.rut.util.algorithm.SortUtil; TLH1>pY&
?J0y|
/** Bzf^ivT3L
* @author treeroot I?CZQ+}Hq
* @since 2006-2-2 i ct])
* @version 1.0 H5|;{q:j
*/ 6=C<>c%+
public class HeapSort implements SortUtil.Sort{ tw@X> G1z
PJ#,2=n~
/* (non-Javadoc) ~n_HP_Kf?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e0 ecD3
*/ UN#S;x*
public void sort(int[] data) { TWTb?HP
MaxHeap h=new MaxHeap(); ?@x/E&
h.init(data); :A;RH
for(int i=0;i h.remove(); i%?*@uj
System.arraycopy(h.queue,1,data,0,data.length); YmG("z
} }GM'.yutX
(ZlU^Gw#UB
private static class MaxHeap{ z1a7*)8P
-9?]IIVb
void init(int[] data){ QT}tvm@PMq
this.queue=new int[data.length+1]; <P<z N~i9j
for(int i=0;i queue[++size]=data; 5^Zg>I
fixUp(size); ~W/z96' 5
} V7/Rby Q
} h";L
gX@aG9
private int size=0; DlJo^|5
*T1_;4i
private int[] queue; {!`6zBsP
#vlgwA
public int get() { Y]a@j!
return queue[1]; %C]>9."
} Fr-SvsNFB
dO\"?aiD
public void remove() { p#tI;"\y
SortUtil.swap(queue,1,size--); 4,ag(^}=
fixDown(1); zt%Mx>V@
} z$sGv19pB
file://fixdown cMIEtK`
private void fixDown(int k) { DmcZta8n]
int j; 8P`"M#fI
while ((j = k << 1) <= size) { eMzk3eOJ
if (j < size %26amp;%26amp; queue[j] j++; 5)40/cBe
if (queue[k]>queue[j]) file://不用交换 *qq+jsA6wH
break; XWw804ir
SortUtil.swap(queue,j,k); /9X7A;O
k = j; %TqC/c
} b.938#3,
} <UCl@5g&
private void fixUp(int k) { nk:)j:fr
while (k > 1) { \M-OC5fQv
int j = k >> 1; l,).p
if (queue[j]>queue[k]) G~m<;
break; khd4ue$
SortUtil.swap(queue,j,k); >Q*Wi
k = j; \)e'`29;
} 6LhTBV
} d;>QhoiL
~LC-[&$
} KPki}'GO
CC`JZ.SO
} 7EJ+c${e.-
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SortUtil： +ge?w#R
Vvo7C!$z
package org.rut.util.algorithm; 6\t@)=C,Q
dN6?c'iN?2
import org.rut.util.algorithm.support.BubbleSort; ~J]qP#C
import org.rut.util.algorithm.support.HeapSort; qP ,EBE
import org.rut.util.algorithm.support.ImprovedMergeSort; '"Nr,vQo
import org.rut.util.algorithm.support.ImprovedQuickSort; ~ri5zb20
import org.rut.util.algorithm.support.InsertSort; naNghGQ
import org.rut.util.algorithm.support.MergeSort; !@sUj
import org.rut.util.algorithm.support.QuickSort; 2<6UwF
import org.rut.util.algorithm.support.SelectionSort; p7~!z.)o
import org.rut.util.algorithm.support.ShellSort; !x)R=Z/C
k7^5Bp8=
/** ,%y/kS]
* @author treeroot xD7]C|8o
* @since 2006-2-2 /{2,zW
* @version 1.0 kxCSs7J/
*/ 4ppz,L,4
public class SortUtil { JGZBL{8
public final static int INSERT = 1; n"8Yv~v*2j
public final static int BUBBLE = 2; EX"yxZ~
public final static int SELECTION = 3; K NOIZj
public final static int SHELL = 4; @F>D+=hS
public final static int QUICK = 5; [>9is=>o.
public final static int IMPROVED_QUICK = 6; >mkFV@`
public final static int MERGE = 7; jWgX_//!
public final static int IMPROVED_MERGE = 8; YkADk9fE
public final static int HEAP = 9; A}w/OA97RO
?A0)L27UE&
public static void sort(int[] data) { O0:q;<>z
sort(data, IMPROVED_QUICK); |BYRe1l6l
} .Y|!:t|
private static String[] name={ $Kd>:f=A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7$#u
}; kf9X$d6
xx $cnG
private static Sort[] impl=new Sort[]{ +ai< q>+
new InsertSort(), 8,|kao:
new BubbleSort(), I 6O
new SelectionSort(), bMBLXk
new ShellSort(), d'ifLQ\
new QuickSort(), 1H9!5=Ff
new ImprovedQuickSort(), z!\*Y =e
new MergeSort(), r|Z{-*`
new ImprovedMergeSort(), w(F%^o\
new HeapSort() 0}9h]X'
}; sq]F;=[5
<Z$J<]I
public static String toString(int algorithm){ 9u_Pj2%56.
return name[algorithm-1]; 8EY:tzw
} 7:~_D7n
q\)-BXw:
public static void sort(int[] data, int algorithm) { T{'RV0%
impl[algorithm-1].sort(data); Ca-j?bb!
} /Kbl%u
{+Jv+J9
public static interface Sort { Hp?/a?\Xm
public void sort(int[] data); #E]59_
} 4K74=r),i
*ui</+
public static void swap(int[] data, int i, int j) { x^CS"v7
int temp = data; Wl4%GB
data = data[j]; =V5%+/r+f
data[j] = temp; 5-M-X#(
} AwN!;t_0+N
} !'Kjx