[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; qzk/P1{-
} A4RA5N/}
int i1=l; 61|uvTX
int i2=mid+1; Kx.'^y
for(int cur=l;cur<=r;cur++){ ]h4^3
if(i1==mid+1) :;[pl|}tM
data[cur]=temp[i2++]; _ndc^OG
else if(i2>r) ZH8O%>!
data[cur]=temp[i1++]; V<~.:G$3H
else if(temp[i1] data[cur]=temp[i1++]; <<#-IsT
else _'9("m V
data[cur]=temp[i2++]; OO?d[7Wt0
} =O= 0 D
} :s8^nEK
oej5bAi
} \lj.vzD-A
r*#ApM"L
改进后的归并排序: V1Yab#
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package org.rut.util.algorithm.support; ~R7F[R
SMHQo/c r
import org.rut.util.algorithm.SortUtil; oRl~x^[%[-
[JAHPy=+w
/** >TSPEvWc
* @author treeroot 6&8([J
* @since 2006-2-2 yuyI)ebC
* @version 1.0 `#O%ZZ+
*/ ML6Y_|6 |
public class ImprovedMergeSort implements SortUtil.Sort { H;('h#=cD
kev|AU (WX
private static final int THRESHOLD = 10; 6H+'ezM
Rf*we+
/* RTN?[`
* (non-Javadoc) l1(6*+
* 0vN<0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zrt\]h+
*/ o+UCu`7e
public void sort(int[] data) { +O`3eP`u
int[] temp=new int[data.length]; <a9<rF =r
mergeSort(data,temp,0,data.length-1); L%G/%*7;c
} VyQ@. Lm
8K: RoR
private void mergeSort(int[] data, int[] temp, int l, int r) { }DH3_M!
int i, j, k; Cjh0 .{
int mid = (l + r) / 2; a!UQ]prT
if (l == r) [ j'L*j
return; y$,K^f
if ((mid - l) >= THRESHOLD) =MQpYX
mergeSort(data, temp, l, mid); )xJCH9h
else kKbq?}W[
insertSort(data, l, mid - l + 1); Z>=IP-,>
if ((r - mid) > THRESHOLD) 1'.SHY|
mergeSort(data, temp, mid + 1, r); +Sz%2Q
else t8vR9]n
insertSort(data, mid + 1, r - mid); iuxI$
l%vX$Kw
for (i = l; i <= mid; i++) { Ir%L%MuR]
temp = data; F@m]Imn5Dx
} O&DkB*-
for (j = 1; j <= r - mid; j++) { iBCZx>![;
temp[r - j + 1] = data[j + mid]; 6T-h("t
} ]=X6* E*/E
int a = temp[l]; s98Jh(~
int b = temp[r]; ;#'YO1`gf3
for (i = l, j = r, k = l; k <= r; k++) { L`sg60z
if (a < b) { Po(Y',xI[
data[k] = temp[i++]; ug?gVK
a = temp; UoDS)(i
} else { A0mj!P9
data[k] = temp[j--]; 6"3-8orj
b = temp[j]; p~(+4uA
} m Acny$u
} UZcsMMKH
} 2o8:[3C5
>"LHr&;m&h
/** ^HS;\8Xvb
* @param data PE!/n6
* @param l U;SReWqU
* @param i 0L->e(Vf7u
*/ 8 $5 y]%!
private void insertSort(int[] data, int start, int len) { uD'yzR!]+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .bdp=vbA
} irjOGn
} Y-Iu&H+\
} !H)$_d \uj
} _*&I[%I5
.AB n$ml]
堆排序： 1omjP`]|,
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package org.rut.util.algorithm.support; @= E~`
E[$"~|7|$
import org.rut.util.algorithm.SortUtil; @`Fv}RY{
'=s{9lxn^
/** ^)J2tpr;]=
* @author treeroot B#Q` !B4v
* @since 2006-2-2 ar&j1""
* @version 1.0 }-Ds%L
*/ `efC4#*!!
public class HeapSort implements SortUtil.Sort{ "Wz8f
fAEgrw%Ti
/* (non-Javadoc) 3o_)x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _\/KI /
*/ mS$9D{
public void sort(int[] data) { [zC1LTXe
MaxHeap h=new MaxHeap(); CdEQiu
h.init(data); EF>vu+YK
for(int i=0;i h.remove(); PL/g@a^tY
System.arraycopy(h.queue,1,data,0,data.length); &7\=Jw7w
} h.Y&_=Gc
ddTsR
private static class MaxHeap{ lF[m*}l
D=+md
void init(int[] data){ nrBpq
this.queue=new int[data.length+1]; }Z/[ "
for(int i=0;i queue[++size]=data; uOQ!av2"Rf
fixUp(size); RGu`Jk
} ]!c59%f=
} r5RUgt
J#>)+
private int size=0; a/\SPXQ/9
x5w5xw
private int[] queue; &nV/XLpG
lQS(\}N
public int get() { ^cUmLzM
return queue[1]; "h@=O c
} *&vlfH
1 5heLnei
public void remove() { ._E 6?
SortUtil.swap(queue,1,size--); =,BDd$e
fixDown(1); {})d}dEC
} ]Cc3}+(s
file://fixdown ]8n*fo2#
private void fixDown(int k) { .B+Bl/
int j; qnu<"$
while ((j = k << 1) <= size) { /IxoS
if (j < size %26amp;%26amp; queue[j] j++; L[s`8u<_)z
if (queue[k]>queue[j]) file://不用交换 XnwVK
break; E"O6N.}.
SortUtil.swap(queue,j,k); AZ9;6Df
k = j; CL|d>
} "[QQ(]={
} uGmv`R_
private void fixUp(int k) { c$.Zg=
while (k > 1) { N&uRL_X.
int j = k >> 1; BS.5g<E2q
if (queue[j]>queue[k]) `K7UWtp
break; 4-CGe
SortUtil.swap(queue,j,k); sck.2-f"
k = j; LULRi#n
} (+CNs
} +F?}<P_v
tP:ER
} bMA0#e2
b FMBIA|
} <e?1&56
4<j7F4
SortUtil： D03QisH=
<.Dg3RH
package org.rut.util.algorithm; U!GfDt
3v91yMx
import org.rut.util.algorithm.support.BubbleSort; .rwa=IW
import org.rut.util.algorithm.support.HeapSort; o5E5s9n
import org.rut.util.algorithm.support.ImprovedMergeSort; GI<3L K\
import org.rut.util.algorithm.support.ImprovedQuickSort; aD&4C-,1
import org.rut.util.algorithm.support.InsertSort; /;5/7Bvj
import org.rut.util.algorithm.support.MergeSort; oO3X>y{gN
import org.rut.util.algorithm.support.QuickSort; .iV-Y*3<
import org.rut.util.algorithm.support.SelectionSort; ]@I>OcH
import org.rut.util.algorithm.support.ShellSort; s$JO3-)
{/|tVc63
/** ;=UkTn}N?l
* @author treeroot 8DuD1hZq
* @since 2006-2-2 HEk{!Y
* @version 1.0 ,rNv}
*/ Pil_zQ4
public class SortUtil { H -K%F_#
public final static int INSERT = 1; $qR<_6j
public final static int BUBBLE = 2; uhm3}mWv
public final static int SELECTION = 3; JLbmh1'
public final static int SHELL = 4; YfstE3BV
public final static int QUICK = 5; a)8;P7
public final static int IMPROVED_QUICK = 6; 0<XxR6w
public final static int MERGE = 7; <74r
public final static int IMPROVED_MERGE = 8; V}MRdt7
public final static int HEAP = 9; lt("yqBu
"$nff=]
public static void sort(int[] data) { `qV*R 2
sort(data, IMPROVED_QUICK); FN<Sagj
} l`Ae&nc6
private static String[] name={ 8Sk$o.Gy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8 KRo<
}; Zg4kO;r08
$!vK#8-&{
private static Sort[] impl=new Sort[]{ [VE>{4]W
new InsertSort(), T<%%f.x[s
new BubbleSort(), p=[SDk`
new SelectionSort(), m@W>ku
new ShellSort(), Eq=j+ch7
new QuickSort(), 2@!B;6*8q
new ImprovedQuickSort(), GP(ze-Yp
new MergeSort(), hvc3n> Y[}
new ImprovedMergeSort(), xC9?Wt'
new HeapSort() n#5S-z1KNw
}; F@b=S0}K
1'%n?\OK66
public static String toString(int algorithm){ $q##Tys
return name[algorithm-1]; } 4ZWAzH
} qi['~((
&a+=@Z)kf
public static void sort(int[] data, int algorithm) { B"rO
impl[algorithm-1].sort(data); )~CNh5z6Y
} (F&o!W
*mz-g7
public static interface Sort { !E6QED"
public void sort(int[] data); LMNmG]#!
} PVSz%"
t[ZGY,8
public static void swap(int[] data, int i, int j) { y"|gC!V}
int temp = data; M0t9`Z9
data = data[j]; #fDM{f0]R
data[j] = temp; B%WkM\\!^
} lf\^!E:
} ; Kh!OBZFo