[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; _@)-#7
} ^u90N>Dvq
int i1=l; q3v5gz^t
int i2=mid+1; ntPX?/
for(int cur=l;cur<=r;cur++){ N2j^fZd_
if(i1==mid+1) WCqa[=v)t
data[cur]=temp[i2++]; b$ 8R
else if(i2>r) )iC@n8f7o
data[cur]=temp[i1++]; -+2A@kmEJ
else if(temp[i1] data[cur]=temp[i1++]; 4%<wxrod
else G[`2Nd<
data[cur]=temp[i2++]; PD^ 6Ywn>s
} /={N^8^=x
} u^'X>n)oL#
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} %)d7iT~M
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改进后的归并排序: i;qij[W.z
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package org.rut.util.algorithm.support; D^s#pOZS
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import org.rut.util.algorithm.SortUtil; [\fwnS_1
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/** 1jBIi
* @author treeroot Xyz/CZPi
* @since 2006-2-2 Zv mkb%8
* @version 1.0 ;5T}@4m|r
*/ yP` K [/
public class ImprovedMergeSort implements SortUtil.Sort { FH%:NO
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private static final int THRESHOLD = 10; nHF~a?|FT
hVFZQJ?cv
/* 211T}a
* (non-Javadoc) {5ehm
* B=r+ m;(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |{,c2Ck:N
*/ ZifDU@J$t
public void sort(int[] data) { z.h;}QRJ,@
int[] temp=new int[data.length]; \j.l1O
mergeSort(data,temp,0,data.length-1); T.%yeJiE
} y^Q);siSy
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private void mergeSort(int[] data, int[] temp, int l, int r) { CZy3]O"qW
int i, j, k; tK#/S+l
int mid = (l + r) / 2; '4M;;sKW
if (l == r) WD kE 5
return; i>-#QKqJ
if ((mid - l) >= THRESHOLD) .>}Z3jUrf
mergeSort(data, temp, l, mid); 8y[Rwa
else #l9sQ-1Q
insertSort(data, l, mid - l + 1); QWt3KW8)
if ((r - mid) > THRESHOLD) Azr|cKu]
mergeSort(data, temp, mid + 1, r); d}|z+D
else T>hm\!
insertSort(data, mid + 1, r - mid); XW2ZQMos1
j`Ek:
for (i = l; i <= mid; i++) { ]|K6Z>V
temp = data; &?xtmg<d
} f4f)9n
for (j = 1; j <= r - mid; j++) { f?16%Rk<
temp[r - j + 1] = data[j + mid]; 3=Uyt
} ?Ycl!0m
int a = temp[l]; *.1#+h/]3
int b = temp[r]; 8`1]#Vw
for (i = l, j = r, k = l; k <= r; k++) { `]l|YQz\
if (a < b) { a>d`g
data[k] = temp[i++]; +`$$^x
a = temp; p)m5|GH24
} else { >b:5&s\9
data[k] = temp[j--]; *c$UIg
b = temp[j]; mxpw4
} '|Lv-7
} f|/ ,eP$
} g"c7$
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/** Gfy9YH~
* @param data CeUXGa|C
* @param l ;"RyHow
* @param i V)u#=OS
*/ MpJ\4D5G
private void insertSort(int[] data, int start, int len) { kaIns
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TnKOr~@*
} hOFvM&$
} >r}?v3QW
} .*W7Z8!e
} Cy5iEI#
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堆排序： WyM2h
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package org.rut.util.algorithm.support; '*@=SM
#i*PwgC%_
import org.rut.util.algorithm.SortUtil; S<i.O
2#/sIu-L
/** X(8LhsP
* @author treeroot iO18FfM_
* @since 2006-2-2 ]ab q$Y'
* @version 1.0 W+4Bx=Mj
*/ (Gapv9R
public class HeapSort implements SortUtil.Sort{ VpY,@qh
8b4? O"
/* (non-Javadoc) jJ'NYG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "&;X/~j
*/ *M>~$h7
public void sort(int[] data) { mjk<FXW
MaxHeap h=new MaxHeap(); cbzS7q<)
h.init(data); 8|L5nQ
for(int i=0;i h.remove(); id`RscV]
System.arraycopy(h.queue,1,data,0,data.length); >f1fvv6
} `JGW8 _
%t74*cX
private static class MaxHeap{ M[-/&;`f@
'L{pS-+6
void init(int[] data){ Ri::Ek3qu
this.queue=new int[data.length+1]; wM-H5\9n
for(int i=0;i queue[++size]=data; ?zVE7;r4U
fixUp(size); D)S_ p&
} ;/IXw>O(/
} $j@P8<M7
uI9+@oV
private int size=0; hew"p(`
adgd7JjI*
private int[] queue; s%5XBI
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public int get() { ]'hel#L;l
return queue[1]; t.bM]QU!1
} ?hURNlR_Q
*7L1SjZw
public void remove() { G"Ey%Q2K
SortUtil.swap(queue,1,size--); J?4dafkw
fixDown(1); CalWJ
} 28-z
file://fixdown I,]q;lEMt
private void fixDown(int k) { :RBeq,QaO
int j; >Af0S;S
while ((j = k << 1) <= size) { OKu~Nb*
if (j < size %26amp;%26amp; queue[j] j++; Z\n^m^Z =
if (queue[k]>queue[j]) file://不用交换 i`iR7UmHeR
break; h^14/L=|
SortUtil.swap(queue,j,k); !i@A}$y
k = j; WK#%G
} 9gIim
} /{I-gjovy
private void fixUp(int k) { + kF%>F]
while (k > 1) { 23Q 88z
int j = k >> 1; E7B?G3|z3
if (queue[j]>queue[k]) s8';4z
break; I'2I'x\M
SortUtil.swap(queue,j,k); 8"V1h72vcW
k = j; Y%r>=Jvu6
} qIh9? |`U
} EEx:Xk%5hX
ztp2j%'
} @s,kx.S
''z]o#=^9
} ;!3: 3;
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SortUtil： q$K}Fm1C
]-;JHB5A_:
package org.rut.util.algorithm; @,W5K$Ka=
WWOjck#
import org.rut.util.algorithm.support.BubbleSort; l$R9c+L=
import org.rut.util.algorithm.support.HeapSort; 8;f5;7Mn
import org.rut.util.algorithm.support.ImprovedMergeSort; MvaX>n!o
import org.rut.util.algorithm.support.ImprovedQuickSort; 6 Pdao{P
import org.rut.util.algorithm.support.InsertSort; zzd PR}VG
import org.rut.util.algorithm.support.MergeSort; D$TpT X\
import org.rut.util.algorithm.support.QuickSort; <R%TCVwC@
import org.rut.util.algorithm.support.SelectionSort; 7(|f@Y~*
import org.rut.util.algorithm.support.ShellSort; 3Jj&wHp]
.>1Y-NM
/** }-9 c1&m
* @author treeroot y*=Ipdj
* @since 2006-2-2 VG50n<m9
* @version 1.0 Q=#FvsF#z3
*/ 2j]uB0
public class SortUtil { $Ny:At
public final static int INSERT = 1; .%M80X{5~
public final static int BUBBLE = 2; <l eE.hhf.
public final static int SELECTION = 3; ;Qc^xIPy
public final static int SHELL = 4; WQBV~.<Yv
public final static int QUICK = 5; QDKY7"H
public final static int IMPROVED_QUICK = 6; 4<f^/!9w
public final static int MERGE = 7; g\iSc~%?
public final static int IMPROVED_MERGE = 8; Lnq CHe
public final static int HEAP = 9; WB `h)
zp``e;gY
public static void sort(int[] data) { N]\)Ok
sort(data, IMPROVED_QUICK); # 00?]6`z
} {V8uk$
private static String[] name={ u?'J1\z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]A1'+!1$
}; u4 ~.[3E*
kD)]\
private static Sort[] impl=new Sort[]{ )Z\Zw~L
new InsertSort(), OO,EUOh-T:
new BubbleSort(), bPV;"
new SelectionSort(), VS_I'SPPIc
new ShellSort(), s E;2;2u"
new QuickSort(), ]AN%#1++U
new ImprovedQuickSort(), wb##|XyK<c
new MergeSort(), d-8{}Q
new ImprovedMergeSort(), E#!.;AQ
new HeapSort() pA_e{P/
}; rdAy '38g
x]4>f[>*>
public static String toString(int algorithm){ 6(ER$
return name[algorithm-1]; !lM.1gTTC
} [Ov/&jD"
aO bp"
public static void sort(int[] data, int algorithm) { 'X?Iho
impl[algorithm-1].sort(data); :dxKcg7
} 8;,|z%rS"
X `F>kp1
public static interface Sort { 1Cw$^jd
public void sort(int[] data); q &S@\b
} O.-A)S@
DV)NY!
public static void swap(int[] data, int i, int j) { JcfGe4
int temp = data; gQ<{NQMzvd
data = data[j]; %:OX^^i;
data[j] = temp; ;*=7>"o'`
} a=6@} l1<
} `f<w+u