[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; $ACD6u6
} @jevY81)
int i1=l; (dVrGa54
int i2=mid+1; '2.11cM3
for(int cur=l;cur<=r;cur++){ 0I@Cx{$
if(i1==mid+1) meNz0ve
data[cur]=temp[i2++]; +zn207.`
else if(i2>r) @&M$oI$4*
data[cur]=temp[i1++]; O/2Jz
else if(temp[i1] data[cur]=temp[i1++]; >On"BP# U
else QHuh=7u)
data[cur]=temp[i2++]; E?Ofkc$q
} JqmKD4p
} /Jci1o
_ 0Ced&i
} bB|P`lL
"sU ~|
改进后的归并排序: -6u#:pVpU
qo"_w%{
package org.rut.util.algorithm.support; =3Hv
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import org.rut.util.algorithm.SortUtil; !4l\*L
!~~j&+hK\
/** gC qQ~lWZ
* @author treeroot M~&X?/8
* @since 2006-2-2 nzK"eNDN.
* @version 1.0 3?R QPP
*/ 'U'#_mYG
public class ImprovedMergeSort implements SortUtil.Sort { wam-=3W
r@m2foaO
private static final int THRESHOLD = 10; -P3;7_}]:h
,dIo\Lm
/* ]/{987
* (non-Javadoc) .}l&lj@#
* `2Oh0{x0*O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @UidQX"b
*/ N>}2&'I
public void sort(int[] data) { [5Dg%?x
int[] temp=new int[data.length]; *PVv=SU
mergeSort(data,temp,0,data.length-1); +w pe<T
} dECH/vJ^
T>;Kq;(9
private void mergeSort(int[] data, int[] temp, int l, int r) { )c$)am\I{
int i, j, k; Z*rA~`@K6
int mid = (l + r) / 2; Ut xe
if (l == r) K2GcU_*t
return; ^BFD -p
if ((mid - l) >= THRESHOLD) 0fTEb%z8
mergeSort(data, temp, l, mid); !bi}9w
else JrdH6Zg
insertSort(data, l, mid - l + 1); ].eY]o}=
if ((r - mid) > THRESHOLD) )tV^)n[w
mergeSort(data, temp, mid + 1, r); Z|kMoB
else >O{/%(9
insertSort(data, mid + 1, r - mid); ?)~j>1"S
$ (gR^L
for (i = l; i <= mid; i++) { @GiR~bKZ
temp = data; D< 4!7*9%
} nBVknyMFNF
for (j = 1; j <= r - mid; j++) { :9E_L2M
temp[r - j + 1] = data[j + mid]; 5vso%}c
} FiQx5}MMhu
int a = temp[l]; 5E+k}S]M$
int b = temp[r]; KQ x<{-G6
for (i = l, j = r, k = l; k <= r; k++) { d^w*!<8
if (a < b) { :a4FO
data[k] = temp[i++]; F& 'HZX
a = temp; ,T|%vqbmw
} else { ymsqJ
data[k] = temp[j--]; Mwdw7MZ"S
b = temp[j]; 69v[*InSd
} ]cv|A^
} 0+\~^
} ewn/@;E
|UO1vA@
/** 2.K"+%
* @param data /e5Fx
* @param l jnoFNIW
* @param i q$Ol"K@
*/ (pjmE7`"P
private void insertSort(int[] data, int start, int len) { DvuL1MeKo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zq5_&AeW
} )^&)f!f
} LQMVC^G
} %-4e8d74/
} sKX%<n$
S"=oU}'|
堆排序： "iof -b=ys
Wb4%=2Qn
package org.rut.util.algorithm.support; [^gSWU
H\kqmPl&
import org.rut.util.algorithm.SortUtil; ^/Hj^4~_U
wBcDL/(>
/** y^C;?B<
* @author treeroot ~~ON!l9n
* @since 2006-2-2 Hc@Z7eQ3^
* @version 1.0 r[$Qtj Q
*/ FVsNOU
public class HeapSort implements SortUtil.Sort{ z^4\?R50yO
^yRCR] oT
/* (non-Javadoc) WPE@yI(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \~
*/ RU`TzD
public void sort(int[] data) { FFgy=F
MaxHeap h=new MaxHeap(); l!ye\
h.init(data); (D8'qx-M
for(int i=0;i h.remove(); !qH=l-7A
System.arraycopy(h.queue,1,data,0,data.length); MjU>qx::
} {kJ[)7
XEZ6%Q_
private static class MaxHeap{ $Mx.8FC +
'q[V*4g
void init(int[] data){ \]J"e%
this.queue=new int[data.length+1]; pAmTwe
for(int i=0;i queue[++size]=data; U gB
fixUp(size); S$"A[
} ^d"tymDd
} sZ'3PNpCP
%!rsu-W:Y
private int size=0; ?=IbiT
:B- ,*@EU
private int[] queue; {uj9fE,)
j)F~C8*
public int get() { %h%r6EB1F
return queue[1]; Ro:-u7q
} rMlbj2T
XB;;OP12
public void remove() { 73xI8
SortUtil.swap(queue,1,size--); l}AB):<Z
fixDown(1); ^:-%tpB#!
} Gz*U?R-T
file://fixdown dm$:xE":
private void fixDown(int k) { <6apv(2a
int j; uR"]w7=
while ((j = k << 1) <= size) { `%ymg8^
if (j < size %26amp;%26amp; queue[j] j++; 0/KNXz
if (queue[k]>queue[j]) file://不用交换 &U 'Ds!
break; g1J]z<&
SortUtil.swap(queue,j,k); vJq`l3&
k = j; T |j^
} OClY,@
} Eun%uah6c
private void fixUp(int k) { r9vC&pWZ
while (k > 1) { <1jiU%!w
int j = k >> 1; 2N,*S
if (queue[j]>queue[k]) t%dPj8~
break; GV[[[fu
SortUtil.swap(queue,j,k); jEO;
k = j; \W@?revK
} sox90o 7
} F37,u|
<I|ryPU9{X
} jA]xpf6}
v5$zz w
} A`r&"i OKA
Y2$%%@
SortUtil： 3]VTQl{P
t1~*q)!Mo
package org.rut.util.algorithm; #-VKk
w|5}V6WD
import org.rut.util.algorithm.support.BubbleSort; TOuFFR
import org.rut.util.algorithm.support.HeapSort; =C:0='a
import org.rut.util.algorithm.support.ImprovedMergeSort; ZK'I$p]b
import org.rut.util.algorithm.support.ImprovedQuickSort; 03#_ (
import org.rut.util.algorithm.support.InsertSort; yz+r@I5
import org.rut.util.algorithm.support.MergeSort; ja>Tnfu
import org.rut.util.algorithm.support.QuickSort; yWK[@;S]%
import org.rut.util.algorithm.support.SelectionSort; IaF79}^
import org.rut.util.algorithm.support.ShellSort; d~_OWCg`
l/I W"A
/** n+i}>3'A
* @author treeroot (^Ln|3iz
* @since 2006-2-2 QWP_8$Q
* @version 1.0 >3Y&jsh<
*/ #e0+;kBh
public class SortUtil { kB:R-St
public final static int INSERT = 1; @O(\TIg
public final static int BUBBLE = 2; x-W0 h
public final static int SELECTION = 3; l:[=M:#p
public final static int SHELL = 4; v]1rH$
public final static int QUICK = 5; 7)]G"m{
public final static int IMPROVED_QUICK = 6; 3whyIXs
public final static int MERGE = 7; KVntBe]I
public final static int IMPROVED_MERGE = 8; l%:_#1?isf
public final static int HEAP = 9; l;C_A;y\
`<Ftn
public static void sort(int[] data) { :H87x?e[
sort(data, IMPROVED_QUICK); \E30.>%,
} }qg!Um0
private static String[] name={ 2,fB$5+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8;5/_BwMu
}; BZBsE :(F
p[$I{F*a
private static Sort[] impl=new Sort[]{ YUH/tl
new InsertSort(), o]j*
new BubbleSort(), | jkmh6
new SelectionSort(), v7R&9kU{
new ShellSort(), (/Mc$V
new QuickSort(), 'K!kJ9oqe
new ImprovedQuickSort(), rx"zqm9 }u
new MergeSort(), MoA{ /{
new ImprovedMergeSort(), )<|TEp4r-
new HeapSort() QJ/SP
}; s6$3[9Vh&9
7PMZt$n
public static String toString(int algorithm){ y{N9.H2
return name[algorithm-1]; p%s D>1k
} a !IH-XJ2
ZUu^==a
public static void sort(int[] data, int algorithm) { j.6kjQN
impl[algorithm-1].sort(data); 2*|]#W
} UdGoPzN
GxkG$B
public static interface Sort { V#~.Jg7
public void sort(int[] data); u62sq: GjH
} A0XFu}
U,=K_oBAq
public static void swap(int[] data, int i, int j) { x6t;=
int temp = data; |^F-.Z
data = data[j]; eZ!k'bS=
data[j] = temp; Vo%d;>!G\;
} H@zk8]_P
} b>i=",i\