[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; ^ 'W<|
} T;jy2|mLo
int i1=l; *V}T}nK7
int i2=mid+1; M{:}.H<a
for(int cur=l;cur<=r;cur++){ _)AX/%^%
if(i1==mid+1) {T EF#iF
data[cur]=temp[i2++]; AP*Z0OFE
else if(i2>r) %DH2]B? 0
data[cur]=temp[i1++]; @ov*Fh
else if(temp[i1] data[cur]=temp[i1++]; p2Yc:9r9+A
else _?Q0yVH;,
data[cur]=temp[i2++]; 8{QN$Qkn
} |/rms`YQ
} )xKZ)SxV
}U-h^x'
} Z_^i2eJYT
K]5@bm
改进后的归并排序: i#c1ZC
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package org.rut.util.algorithm.support; mOm_a9ML
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import org.rut.util.algorithm.SortUtil; 3sUTdCnNf
GZ xG!r-
/** ;A^Ii>`
* @author treeroot h+ixl#:
* @since 2006-2-2 x93t.5E6
* @version 1.0 6@ B_3y
*/ 7{0;<@
public class ImprovedMergeSort implements SortUtil.Sort { ?4p\ujc
l\+^.ezD
private static final int THRESHOLD = 10; PtP{_9%Dz
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/* QnHb*4<
* (non-Javadoc) 3QNu7oo
* glk-: #
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9eG{"0)
*/ s.VtmAH
public void sort(int[] data) { l-?B1gd,l
int[] temp=new int[data.length]; :2+,?#W
mergeSort(data,temp,0,data.length-1); }.+{M.[}
} %9 kOl
M1UabqQ
private void mergeSort(int[] data, int[] temp, int l, int r) { @D$^- S6
int i, j, k; 9@'^}c#
int mid = (l + r) / 2; D}.Pk>5
if (l == r) )w3?o#@
return; =8`!Ph@(
if ((mid - l) >= THRESHOLD) _[J @w.l(
mergeSort(data, temp, l, mid); 'IVNqfC)u
else u`K)dH,
insertSort(data, l, mid - l + 1); q.xt%`@aA
if ((r - mid) > THRESHOLD) ~8fy qE$
mergeSort(data, temp, mid + 1, r); 7sgK+ ip
else wlSl ~A/s
insertSort(data, mid + 1, r - mid); gXrXVv<)yw
qIXo_H&\C
for (i = l; i <= mid; i++) { Kyn[4Bu!?
temp = data; F@4TD]E0^
} ;!RS q'L1
for (j = 1; j <= r - mid; j++) { V]4g- CS[
temp[r - j + 1] = data[j + mid]; yiourR)H<
} uP;qs8
int a = temp[l]; R;XG2
int b = temp[r]; by*?PhfF
for (i = l, j = r, k = l; k <= r; k++) { V?_:-!NJ(
if (a < b) { 3 VNPdXsh
data[k] = temp[i++]; ]' ck!eG
a = temp; S_ELZO#7
} else { c)L1@qdZ
data[k] = temp[j--]; aHhr_.>X
b = temp[j]; kfb*|
} VR5CRNBJ
} B4uJT~,7>
} NFYo@kX> G
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/** 0-s[S
* @param data {nr}C4]o
* @param l [Un~]E.'J
* @param i roiUVisq*
*/ whoM$ &
private void insertSort(int[] data, int start, int len) { (L{>la!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )R~l@QBN
} 7IEG%FY T
} A(j9T,!
} oR``Jiob|
} _lK+/"-l
aRt`IcZYz
堆排序： !Eqp,"ts7
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package org.rut.util.algorithm.support; [m*E[0Hu
G6*P]<
import org.rut.util.algorithm.SortUtil; H!H&<71-
4y:pj7h
/** L4Nn:9b
* @author treeroot hN#A3FFo L
* @since 2006-2-2 ftaGu-d%
* @version 1.0 6}q8%[l|
*/ 6ct'O**k*&
public class HeapSort implements SortUtil.Sort{ 'MWu2L!F
XWuHH;~*L
/* (non-Javadoc) f!H~BMA+a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w!GPPW(
*/ )qbjX{GZ7
public void sort(int[] data) { -gq,^j5,
MaxHeap h=new MaxHeap(); L lNd97Z
h.init(data); Tgf\f%,h
for(int i=0;i h.remove(); `l%)0)T
System.arraycopy(h.queue,1,data,0,data.length); F"G]afI9+
} fV>12ici
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private static class MaxHeap{ `]T#uP<u
2#y-3y<G
void init(int[] data){ Qp?+G~*
this.queue=new int[data.length+1]; 9/yE\p.
for(int i=0;i queue[++size]=data; KscugX*x
fixUp(size); 3EVAB0/$
} U8||)+
} VGe OoS
$\9M6k'
private int size=0; [yyL2=7
$'I-z.GV
private int[] queue; Dr_ (u<[
XCP/e p
public int get() { <3SO1@?
return queue[1]; =sIkA)"!=
} A.8[FkiNmD
8AGP*"gI
public void remove() { Y|3n^%I
SortUtil.swap(queue,1,size--); uOv0ut\\G
fixDown(1); :(?F(Q^
} l,lfkm
file://fixdown CRh.1-
private void fixDown(int k) { 'ZiTjv]
int j; ab!Cu8~v
while ((j = k << 1) <= size) { i(9 5=t(
if (j < size %26amp;%26amp; queue[j] j++; SQSPdR+
if (queue[k]>queue[j]) file://不用交换 VfFXH,j
break; flXDGoW
SortUtil.swap(queue,j,k); @OB7TI_/
k = j; CI8bHY$
} >Ohh)$
} d#W>"Cqxqa
private void fixUp(int k) { wG-lR,glb
while (k > 1) { `B%IHr
int j = k >> 1; a3wk#mH
if (queue[j]>queue[k]) K|ZB!oq
break; xIb"8,N
SortUtil.swap(queue,j,k); ->u}b?aF
k = j; cH7Gb|,M
} yh'uH
} {gkY:$xnrG
9sId2py]W
} 8-_\Q2vG
r9vO(m~
} rGt/ /6
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SortUtil： 4~DW7(
; `Vbl_"L
package org.rut.util.algorithm; B]lM69Hz
{Y6;/".DM
import org.rut.util.algorithm.support.BubbleSort; nX>HRdC
import org.rut.util.algorithm.support.HeapSort; u]$e@Vw.
import org.rut.util.algorithm.support.ImprovedMergeSort; T4e-QEH
import org.rut.util.algorithm.support.ImprovedQuickSort; 0)0,&@])7
import org.rut.util.algorithm.support.InsertSort; I%b}qC"5M
import org.rut.util.algorithm.support.MergeSort; 6E))4 lW
import org.rut.util.algorithm.support.QuickSort; P:QSr8K
import org.rut.util.algorithm.support.SelectionSort; <?E~Qc t
import org.rut.util.algorithm.support.ShellSort; Oe_*(q&
`%<^$Ng;
/** ~6!TMVr
* @author treeroot 5f-eWW]!
* @since 2006-2-2 tXg>R _\C
* @version 1.0 ]7/6u.G7R
*/ mNDd>4%H_
public class SortUtil { CYHo~VIK
public final static int INSERT = 1; g54b}vzm
public final static int BUBBLE = 2; 1R"?X'w
public final static int SELECTION = 3; H]<@\g*l@P
public final static int SHELL = 4; >J['so2Bf
public final static int QUICK = 5; s+@`Z*B5
public final static int IMPROVED_QUICK = 6; &~&nJr
public final static int MERGE = 7; av:9kPKm
public final static int IMPROVED_MERGE = 8; `;v5o4.`
public final static int HEAP = 9; T@?uA*J
_@_w6Rh
public static void sort(int[] data) { 277Am*2
sort(data, IMPROVED_QUICK); H"vy[/UcR
} 6_zyPh
private static String[] name={ .% {4B,d$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0w9[Z
}; )oCb9K:km
M\L^ Wf9
private static Sort[] impl=new Sort[]{ ;UPI%DnE]
new InsertSort(), gQ;1SY!
new BubbleSort(), v$]eCj'
new SelectionSort(), 5LVzT1j|
new ShellSort(), UgC{
new QuickSort(), gBPYGci2F
new ImprovedQuickSort(), (-bLP
new MergeSort(), ? f>pKe
new ImprovedMergeSort(), 2J1YrHj3
new HeapSort() G5hh$Nmpi
}; 1 [D,Mu%E
1@6FV x
public static String toString(int algorithm){ FJH'!P\
return name[algorithm-1]; 2)^gd
} F\BD7W
p`mNy o'
public static void sort(int[] data, int algorithm) { TChKm-x
impl[algorithm-1].sort(data); V^D!\)#
} /5&'U!:+
SMIr@*R
public static interface Sort { u0?,CQPL
public void sort(int[] data); t(Sjo8, b
} :J~sz)n4
D)){"Q!b
public static void swap(int[] data, int i, int j) { uNXKUJ V0
int temp = data; R\ZyS )~l
data = data[j]; _I A{I
data[j] = temp; gzd)7np B2
} W"&Y7("y
} ITr@;@}c]