[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; >#Ue`)d`aY
} u]uZc~T
int i1=l; 0 F-db
int i2=mid+1; ;\48Q;
for(int cur=l;cur<=r;cur++){ o@47WD'm
if(i1==mid+1) J[7Sf^r
data[cur]=temp[i2++]; #m;|QWW
else if(i2>r) |\3X7)^8D
data[cur]=temp[i1++]; AREpZ2GiU
else if(temp[i1] data[cur]=temp[i1++]; o<8SiVC2
else %("WoBPH`
data[cur]=temp[i2++]; MlH0
} 6O0CF}B*
} VteMsL/H
YM.Q?p4g
} N,ysv/zq7
-4!S?rHwd+
改进后的归并排序: GMW,+
NPjNkpWm&=
package org.rut.util.algorithm.support; }$X/HK
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import org.rut.util.algorithm.SortUtil; `m+o^!SGe
P?/Mrz
/** #L`'<ge'g*
* @author treeroot P5Is#7udN8
* @since 2006-2-2 m4~>n(
* @version 1.0 yp l`vJ]X
*/ n>k1D
public class ImprovedMergeSort implements SortUtil.Sort { -ztgirU
_Qd CV`
private static final int THRESHOLD = 10; O~DdMW
6O\a\z
/* h"ZR`?h
* (non-Javadoc) -a\[`JHi
* !}I+)@~\w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&`;@ZOH
*/ Tx:S{n7&
public void sort(int[] data) { ]gjB%R[.m
int[] temp=new int[data.length]; EAZLo;
mergeSort(data,temp,0,data.length-1); N4rDe]JnPR
} ~.&PQE$DF
JS2h/Y$
private void mergeSort(int[] data, int[] temp, int l, int r) { Zt/4|&w
int i, j, k; m4x8W2q
int mid = (l + r) / 2; 7v]9) W=y
if (l == r) aaRc?b'/
return; _MxKfah'
if ((mid - l) >= THRESHOLD) ?M9?GodbP.
mergeSort(data, temp, l, mid); JrNqS[c/
else pKNrEq
insertSort(data, l, mid - l + 1); :sA$LNj}
if ((r - mid) > THRESHOLD) CXd/M~:!
mergeSort(data, temp, mid + 1, r); P={8qln,X
else vugGMP;D(
insertSort(data, mid + 1, r - mid); :F`"CR^,
u`?v-
for (i = l; i <= mid; i++) { N'n\_x
temp = data; :878q TB
} KvY1bMU!
for (j = 1; j <= r - mid; j++) { *|Bt!
temp[r - j + 1] = data[j + mid]; Ju"K"
} Z# o;H$
int a = temp[l]; xua E\*m
int b = temp[r]; d:3OC&
for (i = l, j = r, k = l; k <= r; k++) { t .-%@,s
if (a < b) { R q9(<'F
data[k] = temp[i++]; ,-`A6ehg
a = temp; ^^(!>n6r^
} else { yt[*4gF4
data[k] = temp[j--]; Xv2Q8-}w
b = temp[j]; ;i-<dAV8B
} ^u-;VoK
} 0x,NMS
} pKkBAr,
HApjXv!U[
/** 5ggsOqH
* @param data LOi/+;>
* @param l JIU8~D
* @param i ZVni'ym
*/ ?5j}&Y3
private void insertSort(int[] data, int start, int len) { ]=vRjw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =58:e7(df
} 6rBP,\m
} 1<F6{?,z
} ypLt6(1j%
} ZW%;"5uVm)
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堆排序： Ef\&3TcQ
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package org.rut.util.algorithm.support; \\Te\l|L
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import org.rut.util.algorithm.SortUtil; )R6-]TkA_
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/** xz3|m _)
* @author treeroot a_(T9pr
* @since 2006-2-2 iyTKy+3A
* @version 1.0 'cPE7uNT
*/ @M!nAQ8hY
public class HeapSort implements SortUtil.Sort{ @&f~#Xe
E-v^eMWX
/* (non-Javadoc) IN?6~O p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Ng}ZLBM
*/ RC~C}
public void sort(int[] data) { E~ +g6YlT
MaxHeap h=new MaxHeap(); ub9,Wd"^
h.init(data); EI8KKo *
for(int i=0;i h.remove(); :=?od 0]W
System.arraycopy(h.queue,1,data,0,data.length); 9s&dN
} MeDlsO
N?v}\PU
private static class MaxHeap{ MnTqWC90
!0X/^Xv@=
void init(int[] data){ #b>D^=NV>)
this.queue=new int[data.length+1]; p-kug]qX
for(int i=0;i queue[++size]=data; D]?yGI_
fixUp(size); F*p@hl
} mWTV)z57
} dmPAPCm%y
1otE:bi
private int size=0; UId?a}J
?)2;W
private int[] queue; $Gs|Z$(
cv"Bhql
public int get() { JQDS3v=1$
return queue[1]; go?}M]c%7
} NeR1}W
N) '|l0x0
public void remove() { J[al4e^
SortUtil.swap(queue,1,size--); #L+ZHs~
fixDown(1); "{x+ \Z\
} 6vf<lmN
file://fixdown P~h0Ul
private void fixDown(int k) { mbXW$E-&R2
int j; [z,6K=
while ((j = k << 1) <= size) { .TO#\!KBv
if (j < size %26amp;%26amp; queue[j] j++; ( "wmc"qH
if (queue[k]>queue[j]) file://不用交换 d@ef+-
break; q"VC#97`
SortUtil.swap(queue,j,k); jqQGn"!
k = j; m[<z/D
} O|0V mm
} 6+/BYN!&4
private void fixUp(int k) { 4VP$,|a
while (k > 1) { .5!Q(
int j = k >> 1; FW:V<{f
if (queue[j]>queue[k]) ."j=s#OC(
break; ]SUW"5L-
SortUtil.swap(queue,j,k); tZygTvK/S
k = j; ^K0oJg.E
} OjsMT]
} y*T@_on5
8qwPk4
} nZ4@g@e2
O'S9y
} LF ;gdF%@
Nt~G {m
SortUtil： >6:UWvV1
;R7+6
package org.rut.util.algorithm; UcWf O!}D
^&\<[\
import org.rut.util.algorithm.support.BubbleSort; m%U$37A1
import org.rut.util.algorithm.support.HeapSort; / !aVv
import org.rut.util.algorithm.support.ImprovedMergeSort; GpXU&A'r
import org.rut.util.algorithm.support.ImprovedQuickSort; zU";\);
import org.rut.util.algorithm.support.InsertSort; :nS p
import org.rut.util.algorithm.support.MergeSort; ~j[mME}
import org.rut.util.algorithm.support.QuickSort; /! M%9gu
import org.rut.util.algorithm.support.SelectionSort; ]uXmug
import org.rut.util.algorithm.support.ShellSort; @5{h+^
D 4<,YBvV
/** 9s#*~[E*
* @author treeroot 3w8v.J8q
* @since 2006-2-2 6\RZ[gA?
* @version 1.0 w_*$wVl
*/ &{S@v9~IT
public class SortUtil { b q8nV
public final static int INSERT = 1; EO\- J-nM
public final static int BUBBLE = 2; & sgzSX
public final static int SELECTION = 3; QJ,~K&?
public final static int SHELL = 4; U]"6KS
public final static int QUICK = 5; RY]jY | E
public final static int IMPROVED_QUICK = 6; qU^`fIa
public final static int MERGE = 7; ' pfkbmJ
public final static int IMPROVED_MERGE = 8; },,K6*P
public final static int HEAP = 9; @Uqcym.
7W=s.Gy7G\
public static void sort(int[] data) { .e|\Bf0P
sort(data, IMPROVED_QUICK); UQq Qim
} 6OZn7:)Y
private static String[] name={ S+u@ Q}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?:Rw[T@ l
}; %Vhj<gN
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private static Sort[] impl=new Sort[]{ 9G)fJr[c
new InsertSort(), xpWY4Q
new BubbleSort(), &G_XgQsg{
new SelectionSort(), e|4U2\&3y
new ShellSort(), G!U `8R
new QuickSort(), M<xF4L3]
new ImprovedQuickSort(), LDdgI
new MergeSort(), ?zK\!r{
new ImprovedMergeSort(), Z@bKYfGM
new HeapSort() `86})xz{
}; wj\kx\+
\;0UP+
public static String toString(int algorithm){ }T"&4Rvs2R
return name[algorithm-1]; v\-7sgZR
} 35Fs/Gf-n
>+Y@rj2
public static void sort(int[] data, int algorithm) { RC^k#+
impl[algorithm-1].sort(data); yK w.69.
} vgN%vw pL
\1oN't.
public static interface Sort { O[ug7\cl+
public void sort(int[] data); mBDzc(_\$'
} s$xm
&'c&B0j
public static void swap(int[] data, int i, int j) { oA4<AJ2
int temp = data; 1(qL),F;
data = data[j]; ap[Q'=A`
data[j] = temp; >Dq&[9,8
} ~X,ZZ 9H
} Ki\J)l