[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; 4};!nYey!
} *#+d j"
int i1=l; AU}lKq7%
int i2=mid+1; $|C%G6!s?@
for(int cur=l;cur<=r;cur++){ r62x*?/
if(i1==mid+1) ;Z-Cn.
data[cur]=temp[i2++]; z:^Kr"=n
else if(i2>r) lN,b@;
data[cur]=temp[i1++]; Y:^~KS=Uz
else if(temp[i1] data[cur]=temp[i1++]; b\7-u-
else {0lY\#qcE
data[cur]=temp[i2++]; :bE ^b
} -WB?hmx
} QBR9BR
)?%FU?2jrn
} R$K.;
7,!Mmu
改进后的归并排序: 9;&2LT7z
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package org.rut.util.algorithm.support; A]Zp1XEG
r[eZV"
import org.rut.util.algorithm.SortUtil; k*-_CO-h
D=mU!rjr1
/** Lbq"( b
* @author treeroot _0)#-L>xKF
* @since 2006-2-2 X9/V;!
* @version 1.0 C(3yJzg>y
*/ i`gsT[JQRX
public class ImprovedMergeSort implements SortUtil.Sort { P~#!-9?
=3{h9
private static final int THRESHOLD = 10; ~4U[p 50
'# "Z$
/* Fh?;,Z
* (non-Javadoc) $e+@9LNK
* "}\2zub9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *GfGyOS(
*/ '<!/\Jz9l
public void sort(int[] data) { V8NJ0fF
int[] temp=new int[data.length]; 76c4~IG#
mergeSort(data,temp,0,data.length-1); [p$b@og/>
} ,vrdtL
%{yr#F=t#]
private void mergeSort(int[] data, int[] temp, int l, int r) { n #p6i
int i, j, k; Gc~A,_(
int mid = (l + r) / 2; Eof1sTpA
if (l == r) "]LNw=S
return; kNI m90,g
if ((mid - l) >= THRESHOLD) 7t\kof
mergeSort(data, temp, l, mid); "ltvD\
else =oluw|TCe7
insertSort(data, l, mid - l + 1); )"&-vg<
if ((r - mid) > THRESHOLD) ?p. dc~tZ
mergeSort(data, temp, mid + 1, r); e[i&2mM
else p[0Ws460
insertSort(data, mid + 1, r - mid); $sU?VA'h
=P'=P0G
for (i = l; i <= mid; i++) { zr&K0a{hc
temp = data; L-Xd3RCD
} Fz?ON1\
for (j = 1; j <= r - mid; j++) { Nk3]<#$
temp[r - j + 1] = data[j + mid]; ~`#.ZMO
} )FMpfC>An
int a = temp[l]; 3a:(\:?z
int b = temp[r]; )P[B!
for (i = l, j = r, k = l; k <= r; k++) { T)3#U8sT
if (a < b) { MQQiQ 2
data[k] = temp[i++]; $B~a*zZ7
a = temp; U@|{RP
} else { lDe9EJR
data[k] = temp[j--]; 2N5N^S
b = temp[j]; D?}LKs[
} ;p BXAl
} _( w4\]
} KAgiY4
ZZ!d:1'7
/** 3cT
* @param data >%qGK-_
* @param l ^M,t`r{
* @param i ;1NZY.pyc
*/ (^qcX;-
private void insertSort(int[] data, int start, int len) { *7ap[YXZ\w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8ji!FZf
} ,G"?fQ7zR
} %a5Sc|&-
} G2;Uv/vR
} *B#OLx
E"#<I*b
堆排序： y3 LWh}~E
4J!1$
package org.rut.util.algorithm.support; k,X)PQc
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import org.rut.util.algorithm.SortUtil; IhM-a Y y5
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/** ] X%bU*4
* @author treeroot )09_CC!a
* @since 2006-2-2 ksu:RJ-
* @version 1.0 /iy2j8:z
*/ /J/r62
public class HeapSort implements SortUtil.Sort{ ClaYy58v
p&Nw:S
/* (non-Javadoc) Kl(}s{YFn.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]K XknEaxl
*/ aFyNm@a
public void sort(int[] data) { *:BNLM
MaxHeap h=new MaxHeap(); 49/1#^T"Q>
h.init(data); |1J "r.K
for(int i=0;i h.remove(); d>@{!c-
System.arraycopy(h.queue,1,data,0,data.length); .a;-7|x
} I #1_
"N4c>2Q
private static class MaxHeap{ xqP0Z),Ow
BAzc'x&<
void init(int[] data){ Gg5vf]VFo
this.queue=new int[data.length+1]; ?B@hCd)
for(int i=0;i queue[++size]=data; 9tl Fbu
fixUp(size); n0!S;HH-
} ai#EFo+#
} /RX7AXXB
q/Q^\HTk
private int size=0; tSYeZ~
wKk
private int[] queue; .IF dJ
5mER&SX
public int get() { G`6U t
return queue[1]; qpp:h_E
} :w:5;cmV
]Y;$~qQ
public void remove() { -6+HA9zz@C
SortUtil.swap(queue,1,size--); eZ}FKg%2[
fixDown(1); LwY_6[Ef
} m6lNZb]
file://fixdown JC>}(yQA
private void fixDown(int k) { t:m t9}$d
int j; =xG9a_^v
while ((j = k << 1) <= size) { s15f <sp
if (j < size %26amp;%26amp; queue[j] j++; H#w?$?nIWu
if (queue[k]>queue[j]) file://不用交换 KgAc0pz{7H
break; (e F5?I
SortUtil.swap(queue,j,k); ^,U&v;
k = j; %}'sFum`
} F4bF&% R
} <=A&y5o
private void fixUp(int k) { lD/+LyTa
while (k > 1) { | @di<d@
int j = k >> 1; J3$`bK6F6
if (queue[j]>queue[k]) I62Yg p$K
break; P-+^YN,
SortUtil.swap(queue,j,k); fK4laDBTO
k = j; 8 ehC^Cg
} E62*J$wN@
} TuaT-Z~U{
zYls>fbp,
} Z>CFH9
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} azE>uEsE
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SortUtil： zQ)[re)
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package org.rut.util.algorithm; 8d Ftp3(
2{U4wTu
import org.rut.util.algorithm.support.BubbleSort; N3x}YHFF
import org.rut.util.algorithm.support.HeapSort; W_iP/xL
import org.rut.util.algorithm.support.ImprovedMergeSort; >"`:w
import org.rut.util.algorithm.support.ImprovedQuickSort; ]^ RgzK
import org.rut.util.algorithm.support.InsertSort; Nk=M
import org.rut.util.algorithm.support.MergeSort; d^lA52X6P
import org.rut.util.algorithm.support.QuickSort; F},JP'\X
import org.rut.util.algorithm.support.SelectionSort; RKjA`cJ
import org.rut.util.algorithm.support.ShellSort; @XmMD6{<
?.4.Ubc\
/** 7[u&%
* @author treeroot x;b'y4kH
* @since 2006-2-2 sjaG%f&h
* @version 1.0 5R o5Cg~
*/ yM\1n
public class SortUtil { Z.h`yRhO
public final static int INSERT = 1; Aq";z.gi+
public final static int BUBBLE = 2; {p2%4
public final static int SELECTION = 3; 4Pz9&^K
public final static int SHELL = 4; \!w7N :m
public final static int QUICK = 5; -nHc52,
public final static int IMPROVED_QUICK = 6; E"w7/k#3}C
public final static int MERGE = 7; &JF^a
public final static int IMPROVED_MERGE = 8; aZBaIl6I
public final static int HEAP = 9; 'i`;Frmg
y<;#*wB
public static void sort(int[] data) { {ifYr(|p`
sort(data, IMPROVED_QUICK); l@Ml8+
} <m)@~s?D
private static String[] name={ :!r_dmJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PDGh\Y[AK,
}; [9>1e
-MOf[f^
private static Sort[] impl=new Sort[]{ ~Q6ufTGhpM
new InsertSort(), C w$y
new BubbleSort(), $ Q2|{*
new SelectionSort(), fx_7B (
new ShellSort(), vWj|[| <rX
new QuickSort(), RrRCT.+E
new ImprovedQuickSort(), Z~]17{x0
new MergeSort(), zL7+HY*3o
new ImprovedMergeSort(), nR ,j1IUF
new HeapSort() ^KlMBKWyB
}; j~L{=ojz%
43P?f+IYrk
public static String toString(int algorithm){ YSZz4?9\
return name[algorithm-1]; Ymn0?$,D1=
} y#T":jpR
!5{t1 oJ
public static void sort(int[] data, int algorithm) { z{tyB
impl[algorithm-1].sort(data); .c BJA&/
} 4Ly!:GH3T
-bE{yT)7
public static interface Sort { &JP-M=\n
public void sort(int[] data); LiN{^g^fx
} ]huqZI
*.Kc-f4mP
public static void swap(int[] data, int i, int j) { :uMD$zF'5
int temp = data; 8-+IcyUza
data = data[j]; -5E%f|U
data[j] = temp; &&>OhH`
} ~j8x"
} ph3[}><6