[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; U] P{~
} <kJ`qbOU
int i1=l; y Ni3@f
int i2=mid+1; H vHy{S4
for(int cur=l;cur<=r;cur++){ ]F"P3':
if(i1==mid+1) ZFtJoGaR
data[cur]=temp[i2++]; vXZ )
else if(i2>r) pgW^hj\
data[cur]=temp[i1++]; %jJIR88
else if(temp[i1] data[cur]=temp[i1++]; |tC= j.
else nt@uVwfQ
data[cur]=temp[i2++]; N;DE,[:<
} G^Y^)pc]
} a^Z=xlJ/uZ
0EasPbp
} e0]#vqdO
lk[u
改进后的归并排序: s)Xz}QPK.
)=cJW(nfP
package org.rut.util.algorithm.support; o=-Af|#b
Rp!"c
import org.rut.util.algorithm.SortUtil; l GJN;G7
-v:3#9uX)
/** Md0`/F:+2
* @author treeroot 3[@:I^q
* @since 2006-2-2 d6ifJ
* @version 1.0 E B! ,t
*/ RU~Pa+H
public class ImprovedMergeSort implements SortUtil.Sort { N'PK4:
w]fVELU
private static final int THRESHOLD = 10; %.wx]:o
B 74
/* 2&=CC4<!d
* (non-Javadoc) KO/#t~
* 6\Tq,I7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @V&HE:P
*/ *\_>=sS x;
public void sort(int[] data) { [ {HTGz@(
int[] temp=new int[data.length]; ;Aheeq746
mergeSort(data,temp,0,data.length-1); og_ylCh:
} : rudo[L
JE#H&]
private void mergeSort(int[] data, int[] temp, int l, int r) { ^F-2tc
int i, j, k; '@zMZc!
int mid = (l + r) / 2; p}JGx^X~
if (l == r) o?+?@Xb'
return; rHqP[[4B'
if ((mid - l) >= THRESHOLD) a@AIv"q
mergeSort(data, temp, l, mid); [;l;kom
else p<&>1}j=
insertSort(data, l, mid - l + 1); JxKd
if ((r - mid) > THRESHOLD) a/3yn9`sQ
mergeSort(data, temp, mid + 1, r); "yl6WG#J
else k2.\1}\
insertSort(data, mid + 1, r - mid); C>F5=&
1(Z+n,Hh
for (i = l; i <= mid; i++) { 1/syzHjbY
temp = data; wa!z:}]
} i2-]Xl
for (j = 1; j <= r - mid; j++) { =4L%A=]`
temp[r - j + 1] = data[j + mid]; 3lKs>HE0
} />uE)R$
int a = temp[l]; ~@e=+Z
int b = temp[r]; I,aaSBwt&2
for (i = l, j = r, k = l; k <= r; k++) { I,"q:QS+
if (a < b) { ]VEc9?
data[k] = temp[i++]; 9!0-~,o
a = temp; vP_mS 4X
} else { Xc&J.Tw#4*
data[k] = temp[j--]; x_<,GE@
b = temp[j]; 3JD"* <zs
} _,? xc"
} 5g;mc.Cvt
} /g8nT1k
muDOY~.
/** L>lxkq8!Q
* @param data [h>A<O
* @param l `uqe[u;`6
* @param i k^#*x2b
*/ 7W+{U02O
private void insertSort(int[] data, int start, int len) { '}OAl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e&K7n@
} r1z+yx
} p^Z|$aZZ
} [.$/o}
} VMS3Q)Ul
A;e"_$yt8
堆排序： DcC|oU[
d7uS[tKqg
package org.rut.util.algorithm.support; <e wcWr
xa967Ki9"
import org.rut.util.algorithm.SortUtil; Dc 84^>l
dKevhm)R"
/** O7od2fV(i7
* @author treeroot #iRd2Qj%
* @since 2006-2-2 M5xMTP-
* @version 1.0 (Zej\lEN
*/ #MviO!@
public class HeapSort implements SortUtil.Sort{ b/tcD r
9`CJhu
/* (non-Javadoc) iAeq%N1(0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \5a;_N[Ed
*/ @y6^/'
public void sort(int[] data) { "|N0oEG&
MaxHeap h=new MaxHeap(); ~wcp&D
h.init(data); K_;?Sr=
for(int i=0;i h.remove(); [<}W S} .
System.arraycopy(h.queue,1,data,0,data.length); HIvSh6|0p
} =AF;3
) bd`U
private static class MaxHeap{ Yf1%7+V35
mZ0_^
void init(int[] data){ 8M]QDgd.
this.queue=new int[data.length+1]; }0>\%C
for(int i=0;i queue[++size]=data; mR#"ng
fixUp(size); @Hr1.f
} kLXa1^Lq
} J:IAs:e`
BFqM6_/J
private int size=0; H2+V1J=
-k%|sqDZj
private int[] queue; ACI.{`SrQ=
?\<Kb|Q
public int get() { TXbi>t:/S{
return queue[1]; C?<[oQb#
} SPvKq=,
O7J V{'?
public void remove() { ?xwZ< A
SortUtil.swap(queue,1,size--); 0}e&ONDQ
fixDown(1); $J]NWgXl@
} 1C/Vwf:@
file://fixdown &x@N5j5Q
private void fixDown(int k) { sqj8I"<`
int j; R[#B|$
while ((j = k << 1) <= size) { M?DXCsZ,)s
if (j < size %26amp;%26amp; queue[j] j++; $_|jI ^
if (queue[k]>queue[j]) file://不用交换 BDX>J3h
break; UI wTf2B
SortUtil.swap(queue,j,k); a!&m\+?
k = j; |T*t3}
} Bi0&F1ZC!
} 6rlM\k@!
private void fixUp(int k) { g}BS:#$
while (k > 1) { cA{,2CYc
int j = k >> 1; `0=j,54cx
if (queue[j]>queue[k]) N*KM6j
break; " "CNw-^t
SortUtil.swap(queue,j,k); BtQqUk#L2
k = j; Lf;Uv[^c
} |9)y<}c5oM
} _1jeaV9@
K~qKr<)
} @Dd(
n ,@ge
} l HZ4N{n
-(E-yCu
SortUtil： 1V]j8
9 vNz yh\
package org.rut.util.algorithm; o<g1;
/f>I;z1
import org.rut.util.algorithm.support.BubbleSort; /vqsp0e"H
import org.rut.util.algorithm.support.HeapSort; 3B4C@ {
import org.rut.util.algorithm.support.ImprovedMergeSort; i}C%`1+(
import org.rut.util.algorithm.support.ImprovedQuickSort; Qs 'dwc
import org.rut.util.algorithm.support.InsertSort; ~S0T+4$
import org.rut.util.algorithm.support.MergeSort; l i%8X.
import org.rut.util.algorithm.support.QuickSort; \'B%lXh
import org.rut.util.algorithm.support.SelectionSort; |e2s{J2
import org.rut.util.algorithm.support.ShellSort; Oz=!EG|N
T6=~vOzTJ
/** <7j"CcJzZ
* @author treeroot GJBMaT
* @since 2006-2-2 K3`48,`?wA
* @version 1.0 %:Zp7O2UB'
*/ bhCAx W
public class SortUtil { |3gWH4M4**
public final static int INSERT = 1; |(5|6r3
public final static int BUBBLE = 2; fBPJ8VY
public final static int SELECTION = 3; 92^Dn`g
public final static int SHELL = 4; 3e|,Z'4}4
public final static int QUICK = 5; {InW%qSn_
public final static int IMPROVED_QUICK = 6; @Z@S;RWSU
public final static int MERGE = 7; #/WjKr n
public final static int IMPROVED_MERGE = 8; /$UWTq/C7
public final static int HEAP = 9; V&d?4i4/Q
=CL h<&
public static void sort(int[] data) { rU7t~DKS
sort(data, IMPROVED_QUICK); deutY.7g
} n:JG+1I
private static String[] name={ i]0$7s9!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D!bi>]Yd
}; <-!'V,c
N||s#
private static Sort[] impl=new Sort[]{ [Ib17#74
new InsertSort(), u6/;=]0
new BubbleSort(), 0Pg@%>yb~
new SelectionSort(), V`LW~P;
new ShellSort(), m8&XW2S
new QuickSort(), R-\"^BV#Z
new ImprovedQuickSort(), SXmh@a"*\
new MergeSort(), K(}<L-cv
new ImprovedMergeSort(), ns&(g^
new HeapSort() `u7twW*U2
}; t\lx*_lr
7 '7a`-W
public static String toString(int algorithm){ RH;Kbu
return name[algorithm-1]; Cta!"=\
} Y= ^o {C6
;}AcyVV
public static void sort(int[] data, int algorithm) { 2spK#0n.HV
impl[algorithm-1].sort(data); mCEWp
} CdiL{zH\3
[.4D<}e
public static interface Sort { V(n3W=#kky
public void sort(int[] data); eRIdN(pP
} $+HS^m
4\2~wSr
public static void swap(int[] data, int i, int j) { OC2%9Igx0
int temp = data; s9BdmD^|#
data = data[j]; *q(HW
data[j] = temp; DZX4c2J
} 5$ rV0X,O
} E=~Ahkg