[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; c!It^*
} H+ lX-,
int i1=l; hq=,Z1J
int i2=mid+1; 7h%4]
for(int cur=l;cur<=r;cur++){ l _+6=u
if(i1==mid+1) Y25^]ON*\^
data[cur]=temp[i2++]; iK#/w1`
else if(i2>r) FZF @
data[cur]=temp[i1++]; ef=K_, _
else if(temp[i1] data[cur]=temp[i1++]; %Tv^GP{}
else `0{ S3v
data[cur]=temp[i2++]; kbYeV_OwM
} &SH1q_&BQ
} (luKn&826
]ab#q=
} Ha%F"V*
oKA&An
改进后的归并排序: sYqgXE.
o:"anHs
package org.rut.util.algorithm.support; lwT9~Hyp
%T!J$a)qf
import org.rut.util.algorithm.SortUtil; */z??fI27
pXu/(&?
/** e4`uVq5
* @author treeroot >xqM5#m`E$
* @since 2006-2-2 !lTda<;]
* @version 1.0 n((vY.NDV
*/ kkS~4?-*
public class ImprovedMergeSort implements SortUtil.Sort { AQss4[\Dx
EHn"n"Y
private static final int THRESHOLD = 10; Pf<[|yu4?
k`\R+WK$
/* H={&3poBz
* (non-Javadoc) @F~LW6K
* CSTI?A"P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FS"eM"z
*/ usFfMF X
public void sort(int[] data) { ka"337H
int[] temp=new int[data.length]; uH@FU60
mergeSort(data,temp,0,data.length-1); eq[Et +
} 9Q;c,]
d$W
private void mergeSort(int[] data, int[] temp, int l, int r) { {Qv>q$Q
int i, j, k; 1LnyWZ
int mid = (l + r) / 2; K_/zuTy
if (l == r) &a,OfSz
return; !#2=\LUC
if ((mid - l) >= THRESHOLD) lrWQOYf2
mergeSort(data, temp, l, mid); $((6=39s
else o>Er_r
insertSort(data, l, mid - l + 1); &HW1mNF9
if ((r - mid) > THRESHOLD) MJ`3ta
mergeSort(data, temp, mid + 1, r); @}-r&/#
else A{eLl
insertSort(data, mid + 1, r - mid); '8Ztj
Sh6JF574T
for (i = l; i <= mid; i++) { zSEs?
temp = data; P>ceeoYQuA
} S~Z|PLtF
for (j = 1; j <= r - mid; j++) { i_Re*
temp[r - j + 1] = data[j + mid]; LhXUm
} j@gMbiu
int a = temp[l]; @Ky> 9m{
int b = temp[r]; I){\0vb@
for (i = l, j = r, k = l; k <= r; k++) { F>je4S;
if (a < b) { 2&PPz}Sw
data[k] = temp[i++]; uMb>xxf
a = temp; f/,>%j=Ms
} else { "@A![iP
data[k] = temp[j--]; TL$EV>Nr
b = temp[j]; kd`0E-QU
} IQ<MyB(
} .nu @ o40
} aI(7nJ=R
{GDmVWG0q
/** |Xi%
* @param data 5!YA o\S
* @param l =*qD4qYA
* @param i `\`>0hlu
*/ vK7\JZ>
private void insertSort(int[] data, int start, int len) { VErv;GyV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fj7|D'c
} <~TP#uAz
} hz;|NW{u
} a,F&`Wg
} W?yd#j
?Xdak|?i
堆排序： bNFLO Q
~>O)
package org.rut.util.algorithm.support; iovfo2!hD
@`tXKP$so
import org.rut.util.algorithm.SortUtil; 2!&&|Mh}
/525w^'pd
/** Ol"3a|
* @author treeroot 4'$g(+z
* @since 2006-2-2 &l$Q^g
* @version 1.0 .=m,hu~
*/ L9pvG(R%
public class HeapSort implements SortUtil.Sort{ M/x>51<
|KB0P@=a
/* (non-Javadoc) `%+ mO88o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,+`61J3W
*/ !fBF|*/
public void sort(int[] data) { zR!o{8
MaxHeap h=new MaxHeap(); KH\b_>wU2
h.init(data); E_KCNn-f
for(int i=0;i h.remove(); =@TQ>Qw%b
System.arraycopy(h.queue,1,data,0,data.length); V8eB$in
} 6wco&7
NmMIQ@K
private static class MaxHeap{ ["\;kJ.
iU6Gp-<M,
void init(int[] data){ UhIDRR
this.queue=new int[data.length+1]; BpX6aAx
for(int i=0;i queue[++size]=data; E\gim<]
fixUp(size); s@MYc@k
} "[}O"LTQ
} L4uFNM]
9qS"uj
private int size=0; qY\f'K}Q*
NrP0Ep%V
private int[] queue; cb5,P~/q
iH^z:%dP
public int get() { &3J@BMYp
return queue[1]; R |KD&!~Z
} 2lL,zFAq
oD}uOC}FS{
public void remove() { vkLC-Mzm<
SortUtil.swap(queue,1,size--); <F11m(
fixDown(1); ?5kHa_^
} }w4QP+ x
file://fixdown ~ ihI_q"
private void fixDown(int k) { $%VuSrZ&
int j; fib}b?vk
while ((j = k << 1) <= size) { t4?DpE
if (j < size %26amp;%26amp; queue[j] j++; Ts~L:3oaQ
if (queue[k]>queue[j]) file://不用交换 C"IKt
break; vM_:&j_?``
SortUtil.swap(queue,j,k); A)ipFB 6K
k = j; o:V|:*1Q
} u{["50~
} a~8[<Fomj
private void fixUp(int k) { 2Pc%fuC
while (k > 1) { M:5b4$Qh<
int j = k >> 1; {}:ToIp
if (queue[j]>queue[k]) %kgkXc~6|x
break; H4]Ul eU
SortUtil.swap(queue,j,k); <V>dM4Mkr
k = j; pKi&[
} svXR<7)#
} N>>uCkC
"fq{Y~F%`
} KN-avu_Ix
}`+B=h-dW
} <id}<H
41SGWAd#:
SortUtil： |r bWYl.b
;NRF=d>
package org.rut.util.algorithm; p<:!)kt
Y3O#Q)-j$
import org.rut.util.algorithm.support.BubbleSort; aN(|'uO@
import org.rut.util.algorithm.support.HeapSort; @gG<le6
import org.rut.util.algorithm.support.ImprovedMergeSort; 8zMu7,E
import org.rut.util.algorithm.support.ImprovedQuickSort; $v Z$'(
import org.rut.util.algorithm.support.InsertSort; f|sFlUu&
import org.rut.util.algorithm.support.MergeSort; H'HSD,>(
import org.rut.util.algorithm.support.QuickSort; 36am-G
import org.rut.util.algorithm.support.SelectionSort; VWO9=A*Y|
import org.rut.util.algorithm.support.ShellSort; h>Hb`G<
Qqlup
/** )Y)pmjZaG
* @author treeroot -ig6w.%lk
* @since 2006-2-2 @]ao"ui@/
* @version 1.0 <\;#jF%V
*/ ]Zmj4vK J
public class SortUtil { <^$<#Kd
public final static int INSERT = 1; NB<A>baL*
public final static int BUBBLE = 2; 2+X\}s1vN
public final static int SELECTION = 3; *E{2J:`
public final static int SHELL = 4; @lvyDu6e
public final static int QUICK = 5; "Y\_TtY
public final static int IMPROVED_QUICK = 6; #UbF9})q
public final static int MERGE = 7; zk( U8C+
public final static int IMPROVED_MERGE = 8; 2,*M|+W~
public final static int HEAP = 9; :^(>YAyHj^
Qf@
public static void sort(int[] data) { QcpXn4/*
sort(data, IMPROVED_QUICK); l<);s
} A,4fEmWM
private static String[] name={ 9V5-%Iv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ooQQ-?"m
}; %plo=RF
<n#DT
private static Sort[] impl=new Sort[]{ *BR^U$,e
new InsertSort(), 71\xCSI1w&
new BubbleSort(), 4t)/
new SelectionSort(), AF%@VLf
new ShellSort(), GI&h`X5,e
new QuickSort(), KVJ_E!i
new ImprovedQuickSort(), f& CBU
new MergeSort(), 6R^^.tCs
new ImprovedMergeSort(), 8-O)Xx}cU
new HeapSort() LGtIm7
}; V5rST +
KY~-;0x
public static String toString(int algorithm){ BT(CM,bp
return name[algorithm-1]; bcYF\@};
} 6H7],aMg$A
4#lo$#
public static void sort(int[] data, int algorithm) { Gy(=706
impl[algorithm-1].sort(data); ~sXcnxLz
} D"D<+ ;S#
/Sh#_\x
public static interface Sort { 6AhM=C
public void sort(int[] data); R47\Y
} 15sp|$&`
?F3h)(}
public static void swap(int[] data, int i, int j) { G nG>7f[v
int temp = data; #Q /Arq
data = data[j]; sQ\8>[]
data[j] = temp; *Em,*!
} =y!$/(H
} j?+X\PtQ