[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; u6awcn
} =HQH;c"
int i1=l; 0p*(<8D}
int i2=mid+1; |L%F`K>Z:
for(int cur=l;cur<=r;cur++){ g5; W6QX
if(i1==mid+1) C.}Z5BwS
data[cur]=temp[i2++]; bo0m/hVU
else if(i2>r) _udH(NC
data[cur]=temp[i1++]; a%Q.8
else if(temp[i1] data[cur]=temp[i1++]; 6^if%62l&
else CsQ}eW8uEf
data[cur]=temp[i2++]; 9"I/jd0B
} CLdLOu"
} P%ev8]2
:G9.}VrU
} NyeGa
WG1UvPK
改进后的归并排序: neoT\HV
!FA^~
package org.rut.util.algorithm.support; OzA"i y
.%M=dL>
import org.rut.util.algorithm.SortUtil; dSS_^E[{
T,TKt%
/** &g\D-At
* @author treeroot hE/gul?|_
* @since 2006-2-2 ,}=x8Xxr
* @version 1.0 =L 7scv%i
*/ ZgcA[P
public class ImprovedMergeSort implements SortUtil.Sort { "qu%$L
S=0zP36kH:
private static final int THRESHOLD = 10; dScit!T"
_o8il3
/* :eo2t>zF-<
* (non-Javadoc) #?@k=e\
* "e&S*8QhM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c}U&!R2p{
*/ ullq}}
public void sort(int[] data) { }e9E+2}Z\
int[] temp=new int[data.length]; {[m %1O1
mergeSort(data,temp,0,data.length-1); QNLkj`PL/
} _W@q%L>
IMmoq={(z
private void mergeSort(int[] data, int[] temp, int l, int r) { 6w0/;8(_m
int i, j, k; g|9'Lk
int mid = (l + r) / 2; </5uB' B ^
if (l == r) :5L9tNr{_
return; PB.@G,)
if ((mid - l) >= THRESHOLD) t9Ht 54
mergeSort(data, temp, l, mid); ReE6h\j
else m;>HUTj
insertSort(data, l, mid - l + 1); </>;PnzE
if ((r - mid) > THRESHOLD) )|~pocXt<
mergeSort(data, temp, mid + 1, r); W~$YKBW
else 9*h?g+\
insertSort(data, mid + 1, r - mid); *8CI'UX
C:"Al-
for (i = l; i <= mid; i++) { c_s=>z
temp = data; ,P3nZ
} L%# #U'e3
for (j = 1; j <= r - mid; j++) { : P>Wd3m
temp[r - j + 1] = data[j + mid]; VC:.ya|Z
} V*@pmOhz
int a = temp[l]; w^s|YF=c
int b = temp[r]; @/@#,+
for (i = l, j = r, k = l; k <= r; k++) { 02g}}{be8
if (a < b) { c:.k2u
data[k] = temp[i++]; G1K5J`"*
a = temp; ypM0}pdvTp
} else { <Td4 o&JR
data[k] = temp[j--]; ykrb/j|rK
b = temp[j]; )@Fuw*
} AifnC4
} Bd*:y qi
} H4ml0SS^
9XImgeAs
/** ijOUv6=-
* @param data ma)Y@Uw M
* @param l 7%) F]
* @param i _&_#uV<WG0
*/ MDGD*Qn~
private void insertSort(int[] data, int start, int len) { Z&e_yl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sPuNwVX>}I
} 8<#X]I_eP+
} \R#]}g0!
} bnt>j0E
} y=_8ae}aD~
'te4mY}
堆排序： AP&mr1_
'gHa3:US
package org.rut.util.algorithm.support; V`sINX
;^za/h>r
import org.rut.util.algorithm.SortUtil; M >#kfSF+
X-%XZDB6
/** pJ!:mt
* @author treeroot 0Ah'G
* @since 2006-2-2 |dcRDOTe
* @version 1.0 &sleV5V
*/ ,_?P[~1
public class HeapSort implements SortUtil.Sort{ \_;zm+ <{
&,/_"N"?D
/* (non-Javadoc) #!(OTeL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6}zargu(;
*/ c193Or'6Y
public void sort(int[] data) { MO|aN,
MaxHeap h=new MaxHeap(); [}Vne;V
h.init(data); `./$hh
for(int i=0;i h.remove(); XC"]/y
System.arraycopy(h.queue,1,data,0,data.length); Goa0OC,
} D=uU:7m
VX0q!Q
private static class MaxHeap{ ^EY^.?Mg
p2s*'dab7
void init(int[] data){ N]f"+
this.queue=new int[data.length+1]; <RH2G
for(int i=0;i queue[++size]=data; /qp)n">
fixUp(size); nA$zp
} 1;Bgtv$
} w9h`8pt
-8H0f-1
private int size=0; (`<X9w,
f'._{"
private int[] queue; w ryjs!
M|IR7OtLV
public int get() { VX#4Gh,~N
return queue[1]; 7~(|q2ib
} l>p S23
|t](4
public void remove() { /sVy"48-
SortUtil.swap(queue,1,size--); 1 XsB
fixDown(1); 1Z-f@PoM
} ,ND}T#yTR
file://fixdown +72[*_ <
private void fixDown(int k) { xaiA2
int j; gbF^m`A>%+
while ((j = k << 1) <= size) { }@JPvIE
if (j < size %26amp;%26amp; queue[j] j++; e lj]e
if (queue[k]>queue[j]) file://不用交换 hn]><kaA
break; DMO8~5
SortUtil.swap(queue,j,k); NbG`v@yH
k = j; \0. c_
} F#d`nZ=M
} !U,W; R
private void fixUp(int k) { !##OQ
while (k > 1) { 7&-i :2
int j = k >> 1; Ps=OL\i
if (queue[j]>queue[k]) B+W 4r9#
break; cVCylRU"
SortUtil.swap(queue,j,k); ON"F h'?
k = j; 8:s" ^YLN
} mc37Y.
} b3Nr>(Z<}
5k/Y7+*?E
} qRy<W
~@g7b`t=la
} yKSvg5lLy
3!]S8Y*LQP
SortUtil： |cKo#nfzZ
DdO$&/`)YP
package org.rut.util.algorithm; Npu#.)G
nSUQ Eho<
import org.rut.util.algorithm.support.BubbleSort; 5~ho1Ud
import org.rut.util.algorithm.support.HeapSort; p) #7K
import org.rut.util.algorithm.support.ImprovedMergeSort; )q#1C]7m*
import org.rut.util.algorithm.support.ImprovedQuickSort; cO}`PD$i
import org.rut.util.algorithm.support.InsertSort; aH@GhI^@
import org.rut.util.algorithm.support.MergeSort; <<a1a
import org.rut.util.algorithm.support.QuickSort; T.m*LM
import org.rut.util.algorithm.support.SelectionSort; q0* e1QL
import org.rut.util.algorithm.support.ShellSort; eAvOT$
6KT]3*B
/** }@VdtH
* @author treeroot ue?e}hF
* @since 2006-2-2 ~ti{na4W<
* @version 1.0 JQSp2b@'H
*/ 7&ty!PpD
public class SortUtil { A}K2"lQ#>,
public final static int INSERT = 1; 9WE_9$<V
public final static int BUBBLE = 2; lN@SfM4\
public final static int SELECTION = 3; !2]eVO
public final static int SHELL = 4; df@r2 /Y
public final static int QUICK = 5; 6[cC1a3r:
public final static int IMPROVED_QUICK = 6; vd0;33$L
public final static int MERGE = 7; j2\B(PA
public final static int IMPROVED_MERGE = 8; urM=l5Sx
public final static int HEAP = 9; 1D@'uApi.
fcDiYJC*
public static void sort(int[] data) { j A/xe
sort(data, IMPROVED_QUICK); Yfro^}f
} Q:U^):~
private static String[] name={ ^P)W/2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j^ y9+W_b
}; tXZE@JyuC
jS_fwuM
private static Sort[] impl=new Sort[]{ *CsRO
new InsertSort(), bU3e*Er
new BubbleSort(), (~}P.?C8
new SelectionSort(), G:u-C<^'
new ShellSort(), k(<:
new QuickSort(), Sxn#
new ImprovedQuickSort(), 7bC1!x*qw
new MergeSort(), ?<_yW#x6
new ImprovedMergeSort(), TgFj-"L\
new HeapSort() j%7N\Vb
}; tXlo27J
1Z. D3@
public static String toString(int algorithm){ fgzkc"ReK
return name[algorithm-1]; UJhmhI
} ED0Vlw+1
f=$w,^)M
public static void sort(int[] data, int algorithm) { v$H=~m
impl[algorithm-1].sort(data); .Oh4b5
} Etv!:\\[
B;[ai?@c(_
public static interface Sort { -eZ$wn![
public void sort(int[] data); >a6{y
} c,wYXnJ_t
&Nzq/~uqP
public static void swap(int[] data, int i, int j) { NI^=cN,l
int temp = data; |@Cx%aEKU
data = data[j]; 0Yh Mwg?
data[j] = temp; 0[\^Y<ec
} H]^hEQ3DT
} w+,Kpb<x[0