[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; 9/+Nj/
} :o:e,WKxb
int i1=l; %WqNiF0-
int i2=mid+1; go+Q~NV
for(int cur=l;cur<=r;cur++){ UobyK3.%
if(i1==mid+1) 2G$SpfeIu
data[cur]=temp[i2++]; pg]BsJN
else if(i2>r) S'oGt&Z<
data[cur]=temp[i1++]; Z/rP"|EuQ
else if(temp[i1] data[cur]=temp[i1++]; 1B),A~Ip
else Ii7QJ:^
data[cur]=temp[i2++]; y_xnai
} +,~zWv1v
} 0]D0{6x8
8|E'>+ D_-
} n wI!O
ih?^t(i
改进后的归并排序: n|GaV
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package org.rut.util.algorithm.support; ^(viM?*
f+rz|(6vs{
import org.rut.util.algorithm.SortUtil; 4f(Kt,0
6}FO[
/** V]*b4nX7
* @author treeroot fgihy
* @since 2006-2-2 ng:Q1Q9N
* @version 1.0 wts=[U`(
*/ :xKcpY[{
public class ImprovedMergeSort implements SortUtil.Sort { + [Hh,I7
AeAp0cbet
private static final int THRESHOLD = 10; ;3_l@dP"
.z13 =yv
/* 52upoU>}2
* (non-Javadoc) eNiaM6(J
* ?\8?%Qk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j~j\\Y
*/ i#%aTRKHd6
public void sort(int[] data) { G,;,D9jO7
int[] temp=new int[data.length]; p4p@^@<>X
mergeSort(data,temp,0,data.length-1); ~b{Gz6u>
} ;[RZ0Uy=
nx0K$Ptq
private void mergeSort(int[] data, int[] temp, int l, int r) { eT2*W$
int i, j, k; t>8XTqqi
int mid = (l + r) / 2; h*u`X>!!
if (l == r) iAa;6mH
return; fwzb!"!.@
if ((mid - l) >= THRESHOLD) AkOO)0
mergeSort(data, temp, l, mid); 64:fs?H
else $%VuSrZ&
insertSort(data, l, mid - l + 1); Qp`gswvE
if ((r - mid) > THRESHOLD) =_YG#yS
mergeSort(data, temp, mid + 1, r); 0ZQ'_g|%
else ccd8O{G.M
insertSort(data, mid + 1, r - mid); 1:Si,d,wh
_G1gtu]
for (i = l; i <= mid; i++) { bI|2@HV2
temp = data; vM_:&j_?``
} 0a"igq9t
for (j = 1; j <= r - mid; j++) { !n^OM?.4
temp[r - j + 1] = data[j + mid]; u4Em%:Xj
} {mB0rKVm
int a = temp[l]; %X9r_Hx
int b = temp[r]; q&:=<+2"
for (i = l, j = r, k = l; k <= r; k++) { .xBu-?6s6
if (a < b) { a1Qv@p^._b
data[k] = temp[i++]; NH_<q"gT
a = temp; !nAX$i~
} else { ?`J[[",
data[k] = temp[j--]; ~}Rj$%_
b = temp[j]; r H~" 4
} [@4rjGwB
} HYmn:?H
} s`>[F@N7.o
[5Lz/ix=
/** 9P{;HusNw
* @param data ?ve#} \
* @param l -.{g}R%
* @param i NY?;erX
*/ RoAlf+&Qb
private void insertSort(int[] data, int start, int len) { O#Wh TDF"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i*CZV|t US
} ZcYh) HD
} ]r_;dYa
} aM4k *|H?
} 9(":,M(/o
7=(Hy\Q5xH
堆排序： U4G`ZKv(!
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package org.rut.util.algorithm.support; LY-2sa#B$-
? R>h `
import org.rut.util.algorithm.SortUtil; fU!<HDh
9uWY@zu
/** /> 4"~q)
* @author treeroot vB+ '
* @since 2006-2-2 Zdn~`Q{
* @version 1.0 "1,pHR-+R
*/ |g*XK6
public class HeapSort implements SortUtil.Sort{ ;qBu4'C)T
T9s2bC.z55
/* (non-Javadoc) @gG<le6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .H,xle
*/ 8zMu7,E
public void sort(int[] data) { IT$25ZF
MaxHeap h=new MaxHeap(); \}]!)}G
h.init(data); 2<}NB?f`N
for(int i=0;i h.remove(); n9s iX
System.arraycopy(h.queue,1,data,0,data.length); $[yFsA6
} FN[{s
yeHDa+}
private static class MaxHeap{ ^%`wJ.c
@_z4tUP
void init(int[] data){ ;,]P=Ey
this.queue=new int[data.length+1]; zz& ?{vJ
for(int i=0;i queue[++size]=data; cYqfsd# B
fixUp(size); ,*7d
} -ig6w.%lk
} wd)jl%
/@|/^vld
private int size=0; f^VP/rdg
o;?/HE%,[
private int[] queue; 85GKymz$P
MQ"xOcD*F
public int get() { B,{K*-7)MX
return queue[1]; +a*tO@HG
} \G-KplKS
#UbF9})q
public void remove() { cH>%r^G\
SortUtil.swap(queue,1,size--); l<N}!lG|
fixDown(1); ."FuwKSJCo
} KIWe@e
file://fixdown %dY<=x#b
private void fixDown(int k) { xNbPsoK
int j; yiO.z
while ((j = k << 1) <= size) { F8apH{&t
if (j < size %26amp;%26amp; queue[j] j++; 50={%R
if (queue[k]>queue[j]) file://不用交换 2p"WTd
break; p/h Rk<K6
SortUtil.swap(queue,j,k); ~*wk6&|
k = j; ^`G}gWBx}w
} l]5w$dded~
} O?|gp<=d
private void fixUp(int k) { f!JS= N?3
while (k > 1) { Qubp9C#r
int j = k >> 1; =kuMWaD
if (queue[j]>queue[k]) QqU!Najf
break; !/wtYI-`
SortUtil.swap(queue,j,k); mrw=T.
k = j; S9#)A->
} %Z1N;g0
} f`Fi#EKT
6H7],aMg$A
} ,I,\ml
&#iTQD
} B $mX3B+a
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SortUtil： O<V4HUW
^(FdXGs[
package org.rut.util.algorithm; v;ZA4c
wH@Ns~[MA
import org.rut.util.algorithm.support.BubbleSort; :eCU/BC4
import org.rut.util.algorithm.support.HeapSort; *IM;tD+7Q~
import org.rut.util.algorithm.support.ImprovedMergeSort; )>Yu!8i
import org.rut.util.algorithm.support.ImprovedQuickSort; xKho1Z
import org.rut.util.algorithm.support.InsertSort; 9B9(8PVG
import org.rut.util.algorithm.support.MergeSort; 5^x1cUB]
import org.rut.util.algorithm.support.QuickSort; Z+=@<i''
import org.rut.util.algorithm.support.SelectionSort; 5@BBoeG
import org.rut.util.algorithm.support.ShellSort; {lc\,F*$
<.? jc%
/** q*>&^V$M
* @author treeroot RVQh2'w
* @since 2006-2-2 &e!7Z40w@&
* @version 1.0 SBS3?hw
*/ bR)(H%I
public class SortUtil { .*)2SNH
public final static int INSERT = 1; a8UwhjFO
public final static int BUBBLE = 2; ?pd8w#O
public final static int SELECTION = 3; :\o {_
public final static int SHELL = 4; VFys.=
public final static int QUICK = 5; H7DJ~z~J
public final static int IMPROVED_QUICK = 6; mVpMh#zw
public final static int MERGE = 7; #}y2)g
public final static int IMPROVED_MERGE = 8; BGX.U\uc
public final static int HEAP = 9; sdo[D
k1D@fiz
public static void sort(int[] data) { 3(,?S$>
sort(data, IMPROVED_QUICK); rQ qW_t%
} w {3<{
private static String[] name={ )z28=%g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ptdpj)oi&Q
}; e(<str>
[wzb<"kW
private static Sort[] impl=new Sort[]{ s|y "WDyx5
new InsertSort(), z.;ez}6%V
new BubbleSort(), 71t*%
new SelectionSort(), lp^<3o*1
new ShellSort(), Ev}C<zk*
new QuickSort(), TJR:vr
new ImprovedQuickSort(), fNW"+ <W
new MergeSort(), (O(}p~s
new ImprovedMergeSort(), jr:7?8cH0L
new HeapSort() _y} T/I9
}; @/ohg0
P&^;656r
public static String toString(int algorithm){ wLnf@&jQ%
return name[algorithm-1]; 9eQxit7
} dx@-/^.
m()RU"WY
public static void sort(int[] data, int algorithm) { m0a?LY
impl[algorithm-1].sort(data); NdD`Hn-
} /^#;d UB
{C N~S*m
public static interface Sort { I!Z_[M
public void sort(int[] data); IHv[v*4:
} 9^#c| 0T
7%|~>
public static void swap(int[] data, int i, int j) { 6"&6`f
int temp = data; "ozr+:#\
data = data[j]; =V-|#j
data[j] = temp; TI,&!E?;
} e9U9Uu[
} ?Yth0O6?sb