[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; dX^d\ wX
} awC:{5R8v
int i1=l; 3<"!h1x5
int i2=mid+1; 1+Z@4;fk
for(int cur=l;cur<=r;cur++){ cOa){&u
if(i1==mid+1) x 8_nLZ
data[cur]=temp[i2++]; *ydh.R<hb
else if(i2>r) C)z?-f
data[cur]=temp[i1++]; J^y}3ON
else if(temp[i1] data[cur]=temp[i1++]; -u nK;
else U)sw IisE
data[cur]=temp[i2++]; %@,! (
} ~'.SmXZs
} WBd$#V3
uH.1'bR?a
} ?LAiSg=eq
eE0'3?q(
改进后的归并排序: rm5@dM@
3ss0/\3P
package org.rut.util.algorithm.support; hN"cXz"/
*K'_"2J
import org.rut.util.algorithm.SortUtil; Cx[Cst`
H'_v
/** nQm (UN
* @author treeroot d"nms\=p
* @since 2006-2-2 +N>z|T<
* @version 1.0 *~%QXNn`
*/ :|z.F+-/
public class ImprovedMergeSort implements SortUtil.Sort { =cwdl7N&I
]fdxpqz
private static final int THRESHOLD = 10; 25H=RTw
CU+H`-+"J
/* 86f8b{_e"
* (non-Javadoc) <t"KNKI
* .Y*jL&!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2E$K='H:,
*/ v1aE[Q
public void sort(int[] data) { x1'4njTV$
int[] temp=new int[data.length]; C9VtRq
mergeSort(data,temp,0,data.length-1); AcQmY?
} IW$qP&a
9\S,$A{{*
private void mergeSort(int[] data, int[] temp, int l, int r) { ,T;T%/ S
int i, j, k; C.(<IcSG
int mid = (l + r) / 2; zEMZz$Y
if (l == r) \T:*tgU
return; Id<O/C
if ((mid - l) >= THRESHOLD) k"pN
mergeSort(data, temp, l, mid); *a2-Vte
else ClWxL#L6~
insertSort(data, l, mid - l + 1); gnWEsA\!
if ((r - mid) > THRESHOLD) G]k+0&X
mergeSort(data, temp, mid + 1, r); 6Z>G%yK
else `Re{j{~s
insertSort(data, mid + 1, r - mid); dhCrcYn
m> YjV>5
for (i = l; i <= mid; i++) { (p!w`MSv
temp = data; ypy
} =}OcMM`f
for (j = 1; j <= r - mid; j++) { 3T)_(SM"
temp[r - j + 1] = data[j + mid]; 5STk"
} ["~T)d'
int a = temp[l]; 8}.V[,]6
int b = temp[r]; (/e[n.T
for (i = l, j = r, k = l; k <= r; k++) { Lz:Q6
if (a < b) { N;|:Ks#!
data[k] = temp[i++]; @@=e-d
a = temp; *Kmo1>^
} else { tpj6AMO/`d
data[k] = temp[j--]; ;4Wz0suf
b = temp[j]; v"8i2+j
} EHF dQ0gIa
} Qk?J4 B
} n>L24rL
3ahbv%y
/** 5}|bDJ$%_
* @param data I2^@>/p8\(
* @param l 'XP
* @param i S '(K
*/ SG{&2G
private void insertSort(int[] data, int start, int len) { B{2WvPX~q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v:zKn[;o
} V:h3F7
} C)(/NGf
} nPg,(8Tt
} `-yiVUp1:z
-Zfq:Kr
堆排序： 5XF&yYWq
B"3uuk8
package org.rut.util.algorithm.support; * amZ
30<3DA_P
import org.rut.util.algorithm.SortUtil; }:1*@7eR
+OeoA{-W
/** kB]?95>Wx
* @author treeroot @s8wYcW
* @since 2006-2-2 ot; ]?M
* @version 1.0 3dB{DuQ
*/ |TRl>1rv
public class HeapSort implements SortUtil.Sort{ wak`Jte=}m
CJf4b:SY@
/* (non-Javadoc) fK;I0J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jUCDf-_ m
*/ -5u. Ix3
public void sort(int[] data) { PD`EtkUnv
MaxHeap h=new MaxHeap(); M2piJ'T4u
h.init(data); dhmrh5Uf
for(int i=0;i h.remove(); \(`,z}Ht _
System.arraycopy(h.queue,1,data,0,data.length); k!ac_}&NNv
} sUN9E4
XEb+Z7L1
private static class MaxHeap{ T&u25"QOf
6r}w
void init(int[] data){ ?V$@2vBVX4
this.queue=new int[data.length+1]; :r+F95e
for(int i=0;i queue[++size]=data; 5@yBUwMSj
fixUp(size); sZ%wQqy~k
} {PS|q?
} \$Aw[ 5&t
m4 :"c"
private int size=0; M6:$ 0(r
CooOBk
private int[] queue; F0tx.]uS
a~A"uLBR
public int get() { m:5x"o7)ln
return queue[1]; vg-'MG
} Dac ,yW
tW=oAy
public void remove() { t&nK5p95(
SortUtil.swap(queue,1,size--); b0h>q$b
fixDown(1); `V=F>s$W
} R:Tv'I1-L
file://fixdown R0bWI`$Z
private void fixDown(int k) { ^9`~-w
int j; -MuKeCgi
while ((j = k << 1) <= size) { ~5 e 1&
if (j < size %26amp;%26amp; queue[j] j++; q|S,^0cU
if (queue[k]>queue[j]) file://不用交换 f1X]zk(=W
break; U~_G *0
SortUtil.swap(queue,j,k); ?Suv.!wfLl
k = j; E#/vgm=W;
} (&xIBF_6
} tN-B`d1
private void fixUp(int k) { 7-2,|(Xg
while (k > 1) { <-N7Skkk!
int j = k >> 1; 'aJm4W&j
if (queue[j]>queue[k]) wY_! s Qo
break; }080=E
SortUtil.swap(queue,j,k); v.{I^=
k = j; uV\~2#o$_
} f\c%G=y
} b_GAK
;0;5+ J7
} #r;uM+
Rkh ^|_<!
} cPg$*,]
k*o>ZpjNH
SortUtil： {!37w[s~
7^n{BsN
package org.rut.util.algorithm; jU_#-<'r
L;'C5#GN
import org.rut.util.algorithm.support.BubbleSort; ?v$1Fc55
import org.rut.util.algorithm.support.HeapSort; [A46WF>L
import org.rut.util.algorithm.support.ImprovedMergeSort; [K#pU:lTH
import org.rut.util.algorithm.support.ImprovedQuickSort; W24n%Ps
import org.rut.util.algorithm.support.InsertSort; ge!Asm K
import org.rut.util.algorithm.support.MergeSort; GL'zNQP-
import org.rut.util.algorithm.support.QuickSort; *Fz#x{zt
import org.rut.util.algorithm.support.SelectionSort; Ufv0Xj
import org.rut.util.algorithm.support.ShellSort; (qg~l@rf
</33>Fu)
/** ( Y)a`[B
* @author treeroot n_1,-(t
* @since 2006-2-2 zJT,Hv .
* @version 1.0 cDqj&:$e
*/ 66MWOrr
public class SortUtil { 0]MI*s>&
public final static int INSERT = 1; Su/}OS\R
public final static int BUBBLE = 2; THHA~;00YN
public final static int SELECTION = 3; w$FN(BfA
public final static int SHELL = 4; >&l{_b\k
public final static int QUICK = 5; K])| V
public final static int IMPROVED_QUICK = 6; 0uO<7IW9
public final static int MERGE = 7; -`d(>ok
public final static int IMPROVED_MERGE = 8; *D;VZs0O
public final static int HEAP = 9; \aB"D=P\ok
<n)R?P(or
public static void sort(int[] data) { ]]lM)
sort(data, IMPROVED_QUICK); SCKpW#2dP{
} hsHtLH+@
private static String[] name={ NK|m7(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *tL1t\jY
}; +<W8kb
]_&pIBp
private static Sort[] impl=new Sort[]{ tqT-9sEXX.
new InsertSort(), .aE%z/@s=
new BubbleSort(), >TddKR@C
new SelectionSort(), FaA7m
new ShellSort(), GN ?1dwI
new QuickSort(), qwDoYyyu
new ImprovedQuickSort(), A3mSSc6
new MergeSort(), kG|pM54:^
new ImprovedMergeSort(), atWB*kqI
new HeapSort() ;+4X<)y*>
}; ?KtvXTy{m
<nE|Y@S
public static String toString(int algorithm){ {#J1D*?$"
return name[algorithm-1]; "RMvWuNt
} Cd51.Sk(l
,Z p9,nf
public static void sort(int[] data, int algorithm) { :R9 DJh\
impl[algorithm-1].sort(data); /7-qb^V
} AlQ
:h)A/k_
public static interface Sort { @AAkEWo)_
public void sort(int[] data); 1PdxoRa4=
} o;M-M(EZQ6
f+Da W
public static void swap(int[] data, int i, int j) { 8et.A
int temp = data; TLiA>`r=
data = data[j]; B#9T6|2
data[j] = temp; ky98Bz%
} {;j@-=pV
} _=68iDXm