[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; }hrLM[
} 9w'3d@
int i1=l; 0@d)DLM?
int i2=mid+1; m(>_C~rGN
for(int cur=l;cur<=r;cur++){ Vo}3E]
if(i1==mid+1) vZj^&/F$=g
data[cur]=temp[i2++]; RBIf6oxdE
else if(i2>r) Zq=t&$*
data[cur]=temp[i1++]; :#0uy1h
else if(temp[i1] data[cur]=temp[i1++]; /%C6e )7BL
else 6kuN)
data[cur]=temp[i2++]; n)uvN
} 2ME"=!&5
} Zs<}{`-
drP2%u
} G3n* bv
fN~kdm.
改进后的归并排序: s:lar4>kM
s|rlpd4y
package org.rut.util.algorithm.support; Kdh(vNB>
-Bbg'=QZa
import org.rut.util.algorithm.SortUtil; *cxmQ
fL.;-
/** TU$PAwn=
* @author treeroot vl*CU"4
* @since 2006-2-2 `fh^[Q|4n0
* @version 1.0 _=E))Kp{z
*/ {k] 2h4 &h
public class ImprovedMergeSort implements SortUtil.Sort { I"Y d6M% ;
w]GoeIg({
private static final int THRESHOLD = 10; 2T5@~^:7u
2#_9x7g+
/* S1uW`zQ!+_
* (non-Javadoc) DamLkkoA
* 9 U1)sPH;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /r@P\_
*/ }^G'oR1LF
public void sort(int[] data) { q "bpI8j
int[] temp=new int[data.length]; d|on y
mergeSort(data,temp,0,data.length-1); n$y1kD
} '\1%%F7
51`w.ri
private void mergeSort(int[] data, int[] temp, int l, int r) { }n=Tw92g
int i, j, k; JC{}iG6r+
int mid = (l + r) / 2; A42At]
if (l == r) %'\D_W&
return; aEXV^5;,pJ
if ((mid - l) >= THRESHOLD) DetBZ.
mergeSort(data, temp, l, mid); :L:;~tK
else dp)lHBV
insertSort(data, l, mid - l + 1); ksDG8^9>]
if ((r - mid) > THRESHOLD) ehxtNjA
mergeSort(data, temp, mid + 1, r); j])iyn~-Ke
else Aplqxvth
insertSort(data, mid + 1, r - mid); "R*B~73
v8*ZwF
for (i = l; i <= mid; i++) { NXeo&+F
temp = data; Km+29
} 54uTu2
for (j = 1; j <= r - mid; j++) { =AgY8cF!sl
temp[r - j + 1] = data[j + mid]; nkJ*$cT1o
} !}1n?~]`
int a = temp[l]; wO8^|Yf
int b = temp[r]; Crpkq/M
for (i = l, j = r, k = l; k <= r; k++) { cR@z^
if (a < b) { W:rzfO.`Z
data[k] = temp[i++]; TlBLG.-^
a = temp; t"0~2R6i
} else { -vjjcyTt
data[k] = temp[j--]; 'c &Bmd40
b = temp[j]; r.K4<ly-N
} E\V>3rse
} $S,Uoh
} ,R^Pk6m>
?erDP8
/** Ce_Z &?
* @param data ;V@} oD+
* @param l snEkei|0
* @param i =<e# 2
*/ 7#g C(&\A
private void insertSort(int[] data, int start, int len) { P@5^`b|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6]rrj
} \C<rg|
} zJ9,iJyuD
} G*"N}M1)
} fptW#_V2
ol[{1KT{
堆排序： "M:arP5f
#%{\59/w
package org.rut.util.algorithm.support; p}Gk|Kjlq,
N{q'wep
import org.rut.util.algorithm.SortUtil; F2:7UNy,
!^m5by
/** d&ZwVF!
* @author treeroot qC6Q5F
* @since 2006-2-2 #Se
* @version 1.0 *508PY
*/ @Td[rHl
public class HeapSort implements SortUtil.Sort{ NeK:[Q@je
+f7?L]wzic
/* (non-Javadoc) 96PVn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RB\WttI
*/ 1mjv~W
public void sort(int[] data) { {?jdPh
MaxHeap h=new MaxHeap(); oqY?#p/
h.init(data); nQP0<_S
for(int i=0;i h.remove(); H?~u%b@
System.arraycopy(h.queue,1,data,0,data.length); 57j:Lw~
} , m\0IgZdz
PIrUls0}
private static class MaxHeap{ j)]'kg
#k"[TCQ>
void init(int[] data){ T4#knSIlh
this.queue=new int[data.length+1]; H\b5]q%
for(int i=0;i queue[++size]=data; 2h:f6=)r/u
fixUp(size); $yc,D=*Isi
} 6d.m@T6~
} iwVra"y
H@3+K$|v
private int size=0; 6X jUb
q+:(@w6
private int[] queue; GS$k
yd%\3}-
public int get() { jK=*~I
return queue[1]; .{;!bw
} n=SZ8Rj7
FEZ6X
public void remove() { #wd \&
SortUtil.swap(queue,1,size--); IMR|a*=`c
fixDown(1); 5]Ra?rF
} u}rot+)%
file://fixdown 3D.S[^s*
private void fixDown(int k) { &59#$LyH`%
int j; MUe'xK
while ((j = k << 1) <= size) { '; dW'Uwc
if (j < size %26amp;%26amp; queue[j] j++; 4GfLS.Ip
if (queue[k]>queue[j]) file://不用交换 Wu4Nq+
break; 0;H6b=
SortUtil.swap(queue,j,k); Fa!)$eb7
k = j; ZYt __N
} )eFFtnu5
} h]MVFn{
private void fixUp(int k) { /2cI{]B
while (k > 1) { t(Zs*c(
int j = k >> 1; F=om^6G%X5
if (queue[j]>queue[k]) j'i42-Lt/p
break; ._&lG3'
SortUtil.swap(queue,j,k); iXm||?Rnx
k = j; oGVSy`ku
} s4gNS eA
} :ky<`Jfr`
&o/4hnHYt
} ?R]y}6P$
z^/GTY
} a-E-hX2
UBi4itGD
SortUtil： &a=e=nR5
euhZ4+
package org.rut.util.algorithm; =[K)<5,@
hcgc =$^
import org.rut.util.algorithm.support.BubbleSort; VDKS_n
import org.rut.util.algorithm.support.HeapSort; ow_y
import org.rut.util.algorithm.support.ImprovedMergeSort; dn\F!
import org.rut.util.algorithm.support.ImprovedQuickSort; f4I#a&DO
import org.rut.util.algorithm.support.InsertSort; DjzUH{6O
import org.rut.util.algorithm.support.MergeSort; '98h<(@]
import org.rut.util.algorithm.support.QuickSort; z>33O5U
import org.rut.util.algorithm.support.SelectionSort; &fSc{/
import org.rut.util.algorithm.support.ShellSort; 6eT'[Umx
!1'-'Q@f
/** .Sr:"SrT
* @author treeroot pRwGv
* @since 2006-2-2 vif8{S
* @version 1.0 KKjxg7{K
*/ 2-V)>98
public class SortUtil { ES\Q5)t/fo
public final static int INSERT = 1; '95E;RV&
public final static int BUBBLE = 2; T_x+sv=|X!
public final static int SELECTION = 3; uUz`=4%A
public final static int SHELL = 4; +qUkMx
public final static int QUICK = 5; pTALhj#,
public final static int IMPROVED_QUICK = 6; E,LYS"%_
public final static int MERGE = 7; %L j0
public final static int IMPROVED_MERGE = 8; l^!A
public final static int HEAP = 9; V 7l{hEo3?
Z|(c(H2
public static void sort(int[] data) { VS9]po>=
sort(data, IMPROVED_QUICK); rj,K`HD
} V(2,\+t
private static String[] name={ rMHQzQ0%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lU$4NUwM
}; @?Gw|bP
/S]:dDY9K
private static Sort[] impl=new Sort[]{ 'cZMRRc<
new InsertSort(), bEBBwv
new BubbleSort(), ~`2&'8
new SelectionSort(), VyWYfPK
new ShellSort(), vx!::V7s6
new QuickSort(), `z}vONXpAX
new ImprovedQuickSort(), )@]6=*%
new MergeSort(), zg#m09[4
new ImprovedMergeSort(), A<SOT>m]
new HeapSort() 9q1HSJ1)
}; *BLe3dok(
.?rbny
public static String toString(int algorithm){ IvTzPPP
return name[algorithm-1]; [eNkU">}
} @S}/g/+2
K`QOU-M@}
public static void sort(int[] data, int algorithm) { 0]T.Lh$3
impl[algorithm-1].sort(data); U*3AM_w
} A*8m8Sh$
khU6*`lQ
public static interface Sort { ?a5h iN0
public void sort(int[] data); O^9CV*]!n
} m'cz5mcD
/&PKCtm&~
public static void swap(int[] data, int i, int j) { gq'>6vOj
int temp = data; lPM3}52Xu
data = data[j]; B_{HkQ.PW
data[j] = temp; ]} 61vV
} 5D,.^a1 A
} T@TIzz