[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; i<^X z
} F?Lt-a+
int i1=l; )j36Y =r3
int i2=mid+1; -qIi.]/f"9
for(int cur=l;cur<=r;cur++){ `MOw\Z)..
if(i1==mid+1) _`udd)Y2
data[cur]=temp[i2++]; fs'SCwx
else if(i2>r) !cyrt<
data[cur]=temp[i1++]; 1!v{#w{u7
else if(temp[i1] data[cur]=temp[i1++]; 0Qt!w(
else HoGYgye=
data[cur]=temp[i2++]; PEf yHf7`
} ,_e[P
} JQ1MuE'
N#T'}>ty
} t eY@)F
i/9iM\2
改进后的归并排序: TJ"-cWpO1
9eMle?pF
package org.rut.util.algorithm.support; <L-F3Buu
>O-KJZ'GV
import org.rut.util.algorithm.SortUtil; \?xM%(:<Q
HOP*QX8C%
/** T8o](:B~
* @author treeroot ^K?-+
* @since 2006-2-2 MGR:IOTa
* @version 1.0 kUd]8Ff!
*/ h9)S&Sk{s
public class ImprovedMergeSort implements SortUtil.Sort { B0@ Tz39=
Bh3F4k2bg7
private static final int THRESHOLD = 10; (P|[<Sd
q+L'h8
/* h=#w< @
* (non-Javadoc) Np"p*O
* EF`}*7)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2ioHhcYdJU
*/ <V&0GAZ
public void sort(int[] data) { N:lfKI
int[] temp=new int[data.length]; C"I jr=w
mergeSort(data,temp,0,data.length-1); m+(Cl#+
} =)Xj[NNRT
{MgRi7
private void mergeSort(int[] data, int[] temp, int l, int r) { T8^9*]:@c!
int i, j, k; (4YLUN&1O$
int mid = (l + r) / 2; T9nb ~P[
if (l == r) !.vyzCJTzB
return; 1/}H 0\9'
if ((mid - l) >= THRESHOLD) ~5KcbGD~
mergeSort(data, temp, l, mid); y!FO
else 6<lo0PQ"Z
insertSort(data, l, mid - l + 1); 2R/|/>T v
if ((r - mid) > THRESHOLD) MmT/J1zM
mergeSort(data, temp, mid + 1, r); d(q1?{zr4
else f$lb.fy5
insertSort(data, mid + 1, r - mid); Z [!"x&H]h
p<fCGU
for (i = l; i <= mid; i++) { sYKx3[V/
temp = data; "jL>P)
} :iE b^F}
for (j = 1; j <= r - mid; j++) { *ID=X!v
temp[r - j + 1] = data[j + mid]; %Ig$:I(o
} 6v)TCj/
int a = temp[l]; rW?WdEg
int b = temp[r]; xUdF.c
for (i = l, j = r, k = l; k <= r; k++) { yv,FzF}7
if (a < b) { f?5>V
data[k] = temp[i++]; dFz"wvu` o
a = temp; tguB@,O
} else { $)M3fZ$#
data[k] = temp[j--]; d( v"{N}
b = temp[j]; k|;a"56F
} Bu:%trlgV
} 7b"fpB
} 7H Har'=T
#T7v]@K67
/** Y% iqSY
* @param data NW\CEJV
* @param l u zZ|0
* @param i *;A ;)'
*/ !5*VBE\
private void insertSort(int[] data, int start, int len) { "| nXR8t.r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6"-$WUlg
} 7By7F:[b
} {hS!IOM
} Z '5itN^
} !gXxM,R
$?GggP d
堆排序： $LXa]
SAm%$vz%M
package org.rut.util.algorithm.support; hUMG}<
I!/32* s1t
import org.rut.util.algorithm.SortUtil; LW1 4 'A}
s$fM,l:!
/** D6ZHvY8R
* @author treeroot #BRIp(65-6
* @since 2006-2-2 5EtR>Pc
* @version 1.0 v H HgZ
*/ X'OpR
public class HeapSort implements SortUtil.Sort{ |V34;}\4
9^*RK6
/* (non-Javadoc) 8\{!*?9!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 24wDnDyh
*/ {6u)EJ
public void sort(int[] data) { W?Z>g"
MaxHeap h=new MaxHeap(); 'o&d!
h.init(data); - (s0f
for(int i=0;i h.remove(); nlv,j&
System.arraycopy(h.queue,1,data,0,data.length); $#=d@Nw_
} u7e$Mq
gJ l^K
private static class MaxHeap{ "%T~d[M
,i_+Z |Ls
void init(int[] data){ t jM9EP
this.queue=new int[data.length+1]; "ku[b\W
for(int i=0;i queue[++size]=data; Z=% j|xE_
fixUp(size); -mJs0E*g
} hWly8B[I
} }+jB5z'w
?e9tnk3
private int size=0; O/eZ1YAC
.vHHw@
private int[] queue; %;&lVIU0
\]>821r
public int get() { ]]p\1G
return queue[1]; K+Him] b
} +"84.PZ
A^aY-V
public void remove() { /3)\^Pof
SortUtil.swap(queue,1,size--); 1XiA
fixDown(1); "'5(UiSFz
} %Za}q]?
file://fixdown ?q6#M&|j/I
private void fixDown(int k) { w,P@@Q E
int j; M[I=N
while ((j = k << 1) <= size) { XU7to]'K
if (j < size %26amp;%26amp; queue[j] j++; +xuv+mo
if (queue[k]>queue[j]) file://不用交换 ^S|qGu,G
break; <?A4/18K
SortUtil.swap(queue,j,k); Q7y'0s
k = j; MXW1:
} o"Xv)#g&
} ?[#w*Am7
private void fixUp(int k) { cPcH 8Vd
while (k > 1) { ,LZA\XC
int j = k >> 1; lAnOO5@8
if (queue[j]>queue[k]) ;tQc{8O6L
break; i7)J|(N2.
SortUtil.swap(queue,j,k); i).Vu}W#S
k = j; hV $Zr4'
} ta95]|z"j
} ,~7~ S"
g]j&F65D
} 6}Y==GPt
>}wFePl
} ~>)>hy)
tRPIvq/
SortUtil： ZeG4z({af
0J?443AY
package org.rut.util.algorithm; }alq~jY
>Ec;6V e
import org.rut.util.algorithm.support.BubbleSort; xw{K,;WeO
import org.rut.util.algorithm.support.HeapSort; 8nZ_.
import org.rut.util.algorithm.support.ImprovedMergeSort; O!>#q4&]
import org.rut.util.algorithm.support.ImprovedQuickSort; WS6Qp`c)e
import org.rut.util.algorithm.support.InsertSort; ;a|%W4"
import org.rut.util.algorithm.support.MergeSort; qbQdxKk
import org.rut.util.algorithm.support.QuickSort; w3i74C&0
import org.rut.util.algorithm.support.SelectionSort; Iep_,o.Sk
import org.rut.util.algorithm.support.ShellSort; ?6"U('y>n
'hu'}F{
/** F,as>X#
* @author treeroot S*n5d>;
* @since 2006-2-2 $$Tf1hIg
* @version 1.0 Vk`Uz1*
*/ o5RvxGN
public class SortUtil { qsEFf(9G
public final static int INSERT = 1; 3ut<o-
public final static int BUBBLE = 2; V(;T{HW&
public final static int SELECTION = 3; 3rMi:*?
public final static int SHELL = 4; QeT~s5 H
public final static int QUICK = 5; cjtcEW
public final static int IMPROVED_QUICK = 6; 16N|
public final static int MERGE = 7; 6i+AJCkC
public final static int IMPROVED_MERGE = 8; SnX)&>B
public final static int HEAP = 9; IR3+BDE)>
H`k YDp
public static void sort(int[] data) { Ve9)?=!
sort(data, IMPROVED_QUICK); 7Ou]!AOhG
} p<pGqW
private static String[] name={ -`\n/"#X6i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GB Vqc!d
}; %p7onwKq0
jZ"j_=o@
private static Sort[] impl=new Sort[]{ jq#`cay!
new InsertSort(), j"Ew)6j
new BubbleSort(), `c^">L
new SelectionSort(), EqBTN07dZS
new ShellSort(), "5ISKuL
new QuickSort(), uwi.Sg11
new ImprovedQuickSort(), ?Vh#Gr
new MergeSort(), JoG(Nk]
new ImprovedMergeSort(), 1:yil9.\*
new HeapSort() F_ -Xx"
}; jrS$!cEo
9:3`LY3wW
public static String toString(int algorithm){ A!^r9?<
return name[algorithm-1]; LEN=pqGJ.
} pI.8Ip_r
X,lhVT |
public static void sort(int[] data, int algorithm) { x <aR|r
impl[algorithm-1].sort(data); A"qDc
} C]3:&dx9
=j20A6gND
public static interface Sort { YUTh*`1k<
public void sort(int[] data); `SZ-o{
} {wk#n.c
B+jh|@-
public static void swap(int[] data, int i, int j) { A42!%>PB
int temp = data; u|\?6fz
data = data[j]; $tc1te
data[j] = temp; MO| Dwuaf
} "&`>+Yw
} |+[Y_j