[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; #62*'.B4
} I {%Y0S
int i1=l; R > [2*o"
int i2=mid+1; VkkC;/BBW
for(int cur=l;cur<=r;cur++){ D>-srzw
if(i1==mid+1) 7<ZGNxZ~
data[cur]=temp[i2++]; YB1Jv[
else if(i2>r) 4:=VHd
data[cur]=temp[i1++]; hTQ8y10a
else if(temp[i1] data[cur]=temp[i1++]; MCAWn H
else `>- 56 %
data[cur]=temp[i2++]; 0|DyYu
} fcTg/EXn
} " ?Ux\)*
ti^=aB
} _;,"!'R`f
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改进后的归并排序: D}`MY\H
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package org.rut.util.algorithm.support; T/PmT:Qg`
|'``pq/}_
import org.rut.util.algorithm.SortUtil; OFxCV`>ce
!>#gm7
/** ceuEsQ}
* @author treeroot ..R JHa6B
* @since 2006-2-2 q`3HHq
* @version 1.0 eH V#Mey[
*/ PpLiH9}
public class ImprovedMergeSort implements SortUtil.Sort { =$y;0]7Lwi
H)h$@14xu
private static final int THRESHOLD = 10; I7\T :Q[
qe5;Pq !G
/* _^g4/G#13c
* (non-Javadoc) IF cre
* xn>N/+,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0RjFa;j
*/ o!lKP>
public void sort(int[] data) { AyNpY_B0c
int[] temp=new int[data.length]; v|KGzQx$.*
mergeSort(data,temp,0,data.length-1); 1En:QQ4/
} UIkO_/}
0 ;].q*|#
private void mergeSort(int[] data, int[] temp, int l, int r) { `An p;el
int i, j, k; !+z&] S3s
int mid = (l + r) / 2; D~FIv
if (l == r) "=ki_1/P
return; QUm[7<"
if ((mid - l) >= THRESHOLD) v 8EI
mergeSort(data, temp, l, mid); 1#*^+A E
else /#z"c]#
insertSort(data, l, mid - l + 1); 9C8 G(r
if ((r - mid) > THRESHOLD) $o.;}
mergeSort(data, temp, mid + 1, r); T[I7.8g
else bXeJk]#y
insertSort(data, mid + 1, r - mid); *&tTiv{^
a)*(**e$*i
for (i = l; i <= mid; i++) { iaJLIrl
temp = data; E5#ff5
} \<hHZS
for (j = 1; j <= r - mid; j++) { +4p=a [
temp[r - j + 1] = data[j + mid]; ,|GjrT{vf
} 4s9.")G
int a = temp[l]; If]rg+|U
int b = temp[r]; /'zXb_R,$
for (i = l, j = r, k = l; k <= r; k++) { "sIww
if (a < b) { `Hq*l"8
data[k] = temp[i++]; j"jQiL_*
a = temp; xLb=^Xjec
} else { (5A8#7a
data[k] = temp[j--]; M?=I{}!@Q
b = temp[j]; Fn0|v66
} 6b%IPbb
} ?LJiFG]^m
} (w#)|9Cxm
4 aE{}jp1
/** M(yWE0 3
* @param data &^w"
* @param l yVQW|D0,j
* @param i .<E7Ey#
*/ 1JJ1!& >
private void insertSort(int[] data, int start, int len) { $ce*W9`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ly/
} {>PEl;,-
} B873UN
} @LFB}B
} t&p I
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堆排序： AyW=.
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package org.rut.util.algorithm.support; ;>/yY]F7
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import org.rut.util.algorithm.SortUtil; >JA>np
ujl?!
/** vRn]u57O
* @author treeroot M]M>z>1*v
* @since 2006-2-2 y\4/M6
* @version 1.0 +]( #!}oH
*/ W9oWj7&h
public class HeapSort implements SortUtil.Sort{ Sb?Ua*(L:
K'/if5>Bc
/* (non-Javadoc) +J~%z*A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tSnsjd<6.
*/ HO_(it \
public void sort(int[] data) { ?Q$a@)x#
MaxHeap h=new MaxHeap(); Q/]o'_[vW
h.init(data); sxS%1hp3
for(int i=0;i h.remove(); @4Zkkjc4b
System.arraycopy(h.queue,1,data,0,data.length); Pd& Npp3
} R^=v&c{@
ay||yn:
private static class MaxHeap{ hrO9_B|#
{LVA_7@
void init(int[] data){ {;th~[
this.queue=new int[data.length+1]; z,hBtq:-$
for(int i=0;i queue[++size]=data; ir>S\VT4
fixUp(size); \rATmjsKzS
} "'GhE+>Z
} G;J)[y
x%O6/rl
private int size=0; s"J)Jc
*0?@/2&
private int[] queue; _yX.Apv]
fP6.
public int get() { QC!SgV
return queue[1]; Xh}D_c
} fYzP4
X$@qs9?)^
public void remove() { [clwmx
SortUtil.swap(queue,1,size--); A0RSNAM
fixDown(1); FzP1b_i
} @/ nGc9h
file://fixdown : 2$*'{mM
private void fixDown(int k) { 9[W >`JKo
int j; e ky1}
while ((j = k << 1) <= size) { $TS97'$
if (j < size %26amp;%26amp; queue[j] j++; [Y?Y@x"MZ
if (queue[k]>queue[j]) file://不用交换 \t/0Yh-'
break; wr=KAsH<
SortUtil.swap(queue,j,k); hF5T9^8
k = j; {~j/sto-:
} * hS6F
} +A^|aQ
private void fixUp(int k) { r b\t0tg
while (k > 1) { 2_6ON
int j = k >> 1; h:U#F )
if (queue[j]>queue[k]) aG]^8`~>'
break; }%jpqip
SortUtil.swap(queue,j,k); v`jHd*&6)
k = j; bq8Wvlv04
} >M!LC
} Jw&Fox7p
lhnGk'@d
} {o5^nd
~iQBgd@D^
} }@ktAt
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SortUtil： P,a9B2
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package org.rut.util.algorithm; e=s85!
&zJ\D`\,O
import org.rut.util.algorithm.support.BubbleSort; S-ZN}N{,6
import org.rut.util.algorithm.support.HeapSort; w)RedJnf
import org.rut.util.algorithm.support.ImprovedMergeSort; _Y/*e<bU
import org.rut.util.algorithm.support.ImprovedQuickSort; HZ}Igw.Z
import org.rut.util.algorithm.support.InsertSort; 5XzsqeG|
import org.rut.util.algorithm.support.MergeSort; A+frKoi
import org.rut.util.algorithm.support.QuickSort; ZZHzC+O#^
import org.rut.util.algorithm.support.SelectionSort; Iz'Et'w8!
import org.rut.util.algorithm.support.ShellSort; sKsMF:|OT
@iXBy:@
/** } XhL`%
* @author treeroot ?*yB&(a:8
* @since 2006-2-2 aI;$N|]u
* @version 1.0 QtXiUx^ k<
*/ vD:J!|hs(
public class SortUtil { Rg\4#9S JF
public final static int INSERT = 1; nf<I
public final static int BUBBLE = 2; )8eb(!}7
public final static int SELECTION = 3; @Tq-3Um
public final static int SHELL = 4; Lj#xZ!mQS
public final static int QUICK = 5; qO8:|q1%;\
public final static int IMPROVED_QUICK = 6; r}^1dO
public final static int MERGE = 7; afna7TlS
public final static int IMPROVED_MERGE = 8; 5 r_Z3/%
public final static int HEAP = 9; 5M~nNm[xJU
Ovj^ 7r:<s
public static void sort(int[] data) { Eu"8IM!%-
sort(data, IMPROVED_QUICK); +]( y
} E{e
private static String[] name={ mvc ;.+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nnN$?'%~6
}; K|$c#X
Njr;Wa.r+
private static Sort[] impl=new Sort[]{ <?}pCX/O
new InsertSort(), +:=FcsY
new BubbleSort(), a~a:mM>p
new SelectionSort(), L-S5@;"
new ShellSort(), {X{S[(|
new QuickSort(), m&DI2he
new ImprovedQuickSort(), @9n|5.i
new MergeSort(), YcclO
new ImprovedMergeSort(), 0'.z|Jg=
new HeapSort() jF j'6LT9/
}; /]j{P4
gPc1oc(
public static String toString(int algorithm){ `H>&dK|/
return name[algorithm-1]; p8@8b "
} <uJ {>~
1cMLl6Bp>
public static void sort(int[] data, int algorithm) { G3+e5/0
impl[algorithm-1].sort(data); FE{c{G<
} m[Ihte->
0*tnJB
public static interface Sort { MN5}}@
public void sort(int[] data); Jr;w>8B),
} )\VuN-d
sJ^Ff
public static void swap(int[] data, int i, int j) { -64;P9:A>
int temp = data; '[%Pdd]! E
data = data[j]; $gz8! f?
data[j] = temp; F?]J`F\I
} vE8'B^h1
} F.i}&UQ%