[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; 1I8<6pi-
} WkPT6d
int i1=l; q'uGB fE.
int i2=mid+1; LO38}w<k
for(int cur=l;cur<=r;cur++){ a!;#u8f
if(i1==mid+1) gMU%.%p2
data[cur]=temp[i2++]; Ejyo oO45
else if(i2>r) n6C!5zq7U
data[cur]=temp[i1++]; iaRCV6cl
else if(temp[i1] data[cur]=temp[i1++]; "Sw raq
else GX*9R>
data[cur]=temp[i2++]; j%81q
} l}D /1~d
} z<9Llew^e
'7.4!I0'
} !=6\70lJ
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改进后的归并排序: G"Hj$
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package org.rut.util.algorithm.support; oZi{v]4
##OCfCW
import org.rut.util.algorithm.SortUtil; Qp>Z&LvC5
D|'[[=
/** Xv 7noq|
* @author treeroot BUyKiMW49
* @since 2006-2-2 mR8tW"Z2
* @version 1.0 yI%q3lB}^
*/ /.sho\a
public class ImprovedMergeSort implements SortUtil.Sort { &{ZUY3
4Wa*Pcj
private static final int THRESHOLD = 10; y'O<*~C(X
y-"QY[
/* :kd]n$]
* (non-Javadoc) v8C4BuwA
* 7'|aEH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t8*NldC
*/ }?sC1]-j&
public void sort(int[] data) { y!_8m#n S
int[] temp=new int[data.length]; 3kVN[0
mergeSort(data,temp,0,data.length-1); Au:R]7
} =RQI5nHdw
`X<a(5[vV3
private void mergeSort(int[] data, int[] temp, int l, int r) { M6].V*k'2
int i, j, k; .sKfwcYu4
int mid = (l + r) / 2; 'UC1!Z
if (l == r) %pf9Yd0t
return; bo@, B
if ((mid - l) >= THRESHOLD) z8xBq%97us
mergeSort(data, temp, l, mid); er3`ITp:dp
else <*oV-A
insertSort(data, l, mid - l + 1); //%#?JJV
if ((r - mid) > THRESHOLD) {P)O#
mergeSort(data, temp, mid + 1, r); 4b6)+*[O
else ^@Z8_PZo
insertSort(data, mid + 1, r - mid); ^|2m&2
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for (i = l; i <= mid; i++) { ^$[iLX
temp = data; YWL7.Y>%5
} 8i)9ho<
for (j = 1; j <= r - mid; j++) { z|\n^ZK=
temp[r - j + 1] = data[j + mid]; #er% q:
} ^1_CS*
int a = temp[l]; [\&2&
int b = temp[r]; lR]FQnZ
for (i = l, j = r, k = l; k <= r; k++) { @|e we.r
if (a < b) { kU.@HJ[@j
data[k] = temp[i++]; =T1Xfib
a = temp; #qeC)T
} else { *eI{g
data[k] = temp[j--]; 4 =T_h`
b = temp[j]; 8]rObT9>
} RF~G{wz
} 0?O_]SD
} 2IGU{&s
sd =bw
/** m)Wq*&,o
* @param data Jm"W+! E
* @param l Hx!eCTO:*
* @param i 7U2B=]<e-
*/ gAf4wq
private void insertSort(int[] data, int start, int len) { !T 9CpIM%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8~&=vc
} 6?[SlPPE1
} ,LDL%<7t
} @Bn4ZFB@
} m;L3c(r.
7xYz9r)w`
堆排序： )g}G{9M^
6~x a^3G:
package org.rut.util.algorithm.support; tD4-Llj6
I&<'A[vHl
import org.rut.util.algorithm.SortUtil; 1aUg({
b~@+6?
/** +@*>N;$
* @author treeroot ]'$:Y
* @since 2006-2-2 0G2Y_A&e**
* @version 1.0 -Kcjnl92i
*/ J6"GHbsO
public class HeapSort implements SortUtil.Sort{ .tQ(q=#
COmu.'%*
/* (non-Javadoc) 34nfL: y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5fYWuc9}z
*/ 'fCSP|
public void sort(int[] data) { LXPO@2QF
MaxHeap h=new MaxHeap(); 2A9crL$
h.init(data); C%CgWO`Xj
for(int i=0;i h.remove(); $: |`DCC
System.arraycopy(h.queue,1,data,0,data.length); GSd:Plc%
} \&ki79Ly-
AWssDbh/[
private static class MaxHeap{ M9m~ck
uh\Tf5
void init(int[] data){ u|6-[I
this.queue=new int[data.length+1]; oK$Krrs0&
for(int i=0;i queue[++size]=data; 'f.k'2T
fixUp(size); WWo"De@
} ?<Lm58p8
} ]E'?#z.t
g,W34*7=Q
private int size=0; L 4Z+8*
N Z,}v3
private int[] queue; PN:`SWP
.k +>T*c{
public int get() { radP%W-U
return queue[1]; UBk:B
} c;06>1=wP5
OK YbEn#
public void remove() { t1yOAbI
SortUtil.swap(queue,1,size--); )VqPaKZl
fixDown(1); E'5KJn;_7
} 3d4A~!Iz
file://fixdown O'{kNr{u
private void fixDown(int k) { lnLy"f"zV
int j; e4tC[6;
while ((j = k << 1) <= size) { t%0c$c
if (j < size %26amp;%26amp; queue[j] j++; Lo5pn
if (queue[k]>queue[j]) file://不用交换 USHQwn)%
break; )jg*u}u 0
SortUtil.swap(queue,j,k); foL4s;2
k = j; hZ!kh3@:`
} 3IB9-wG
} {2q0Ko<
private void fixUp(int k) { 8eYEi
while (k > 1) { =tP^vgfQ
int j = k >> 1; + #E?)
if (queue[j]>queue[k]) 7J ?s&x
break; B([-GpZt[
SortUtil.swap(queue,j,k); 'J5F+,\Ka
k = j; K2e*AE*
} (n7{?`Yid
} #g0N/
Fq5u%S
} ! Vlx
('$*QC.M
} _ qwf3Q@
*N:0L,8
SortUtil： *+2_!=4V
@!O(%0 =
package org.rut.util.algorithm; DT)][V^w
8{ =ha
import org.rut.util.algorithm.support.BubbleSort; ~(huUW
import org.rut.util.algorithm.support.HeapSort; lSO$Q]!9
import org.rut.util.algorithm.support.ImprovedMergeSort; ' i<4;=M&
import org.rut.util.algorithm.support.ImprovedQuickSort; Un,'a8>V`
import org.rut.util.algorithm.support.InsertSort; udIm}jRA"
import org.rut.util.algorithm.support.MergeSort; -.ZP<,?@F
import org.rut.util.algorithm.support.QuickSort; \i@R5v=zL
import org.rut.util.algorithm.support.SelectionSort; .:B>xg~2
import org.rut.util.algorithm.support.ShellSort; );6f8H@G
,4 _H{+M
/** m<kJH<!j
* @author treeroot `Syfl^9B
* @since 2006-2-2 4z26a
* @version 1.0 ~J>;l s1
*/ BHYguS^qz
public class SortUtil { .XiO92d9
public final static int INSERT = 1; vyB{35p$
public final static int BUBBLE = 2; (v|<" tv
public final static int SELECTION = 3; \_6
public final static int SHELL = 4; 75R#gQ]EV
public final static int QUICK = 5; !MOsP<2
public final static int IMPROVED_QUICK = 6; zUZET'Bm9
public final static int MERGE = 7; 5>daWmD
public final static int IMPROVED_MERGE = 8; T!>hPg
public final static int HEAP = 9; )b>misb/
F4WX$;1
public static void sort(int[] data) { V45adDiZ
sort(data, IMPROVED_QUICK); /x$JY\cq`
} 6w{_+=T
private static String[] name={ fjl9*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LL)t)
}; ^blw\;LB
DI2e%`$
private static Sort[] impl=new Sort[]{ ls!A'@J
new InsertSort(), !Ko>
new BubbleSort(), !G0Mg; ,
new SelectionSort(), VwZ~ntk
new ShellSort(), ;in-)`UC!
new QuickSort(), :yJ([
new ImprovedQuickSort(), ^_DwuY
new MergeSort(), Zv=pS (9
new ImprovedMergeSort(), $x]/|u/9
new HeapSort() lNyyLLt
}; CI-za !T
[u2t1^#Ol
public static String toString(int algorithm){ {=mGXd`x?l
return name[algorithm-1]; 92A9gY
} 8wOscL f:
<OKc?[
public static void sort(int[] data, int algorithm) { Y)1J8kq_
impl[algorithm-1].sort(data); qGEp 6b H
} a%si:_
ty rP[y
public static interface Sort { -WF((s;<#
public void sort(int[] data); /V/NL#(R
} zNoFM/1Vb
ha=2isq
public static void swap(int[] data, int i, int j) { 2ww H3}
int temp = data; ryh"/lu[B
data = data[j]; oVn&L*H
data[j] = temp; eA-oqolY
} nK?S2/o#A
} C~@m6K