[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; 7%&e4'SZO
} Od~e*gA8
int i1=l; G *<g%"
int i2=mid+1; T+S\'f\
for(int cur=l;cur<=r;cur++){ RB6TM
if(i1==mid+1) {].]`#4Jx
data[cur]=temp[i2++]; bN|1%[7
else if(i2>r) (=j/"Mb
data[cur]=temp[i1++]; v?}rA%so
else if(temp[i1] data[cur]=temp[i1++]; ;&!QN#_
else 0b<Qs88yd>
data[cur]=temp[i2++]; Bc`L]<
} a'?LC)^
} UR(i_T&w
c[;A$P= 8.
} xiL+s-
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改进后的归并排序: /`t}5U>S_
S_^;#=_c
package org.rut.util.algorithm.support; =iB$4d2
;Zc0imYL
import org.rut.util.algorithm.SortUtil; EztuVe
k2.\1}\
/** C>F5=&
* @author treeroot e.Jaq^Gw|
* @since 2006-2-2 1/syzHjbY
* @version 1.0 _n4_;0
*/ i2-]Xl
public class ImprovedMergeSort implements SortUtil.Sort { C' WX$!$d
3lKs>HE0
private static final int THRESHOLD = 10; TH55@1W,[
~@e=+Z
/* ,|]k4F
* (non-Javadoc) I,"q:QS+
* b2RW=m-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9!0-~,o
*/ FE:}D;$
public void sort(int[] data) { ^W`RBrJay
int[] temp=new int[data.length]; x_<,GE@
mergeSort(data,temp,0,data.length-1); ~S<}q6H.
} -FrK'!\
L>lxkq8!Q
private void mergeSort(int[] data, int[] temp, int l, int r) { [h>A<O
int i, j, k; fJ=(oF=
int mid = (l + r) / 2; k^#*x2b
if (l == r) 4^9qs%&
return; >wR)p\UEb
if ((mid - l) >= THRESHOLD) iG"1~/U
mergeSort(data, temp, l, mid); E_P,>f
else Pj*]%V
insertSort(data, l, mid - l + 1); |h&okR+_,
if ((r - mid) > THRESHOLD) JUJrtKS
mergeSort(data, temp, mid + 1, r); di]CYLf
else b(adM3MP
insertSort(data, mid + 1, r - mid); L-m' #
k4en/&
for (i = l; i <= mid; i++) { n\$.6 _@x
temp = data; L+mHeS l
} k4!p))ql
for (j = 1; j <= r - mid; j++) { H`yUSB IP
temp[r - j + 1] = data[j + mid]; T hVq5
} _bv9/#tR
int a = temp[l]; z uo:yaO
int b = temp[r]; B`vC>
for (i = l, j = r, k = l; k <= r; k++) { @PK 1
if (a < b) { iQgr8[ SFf
data[k] = temp[i++]; +(`.pa z@
a = temp; Gz--C(
} else { HcV,r,>e
data[k] = temp[j--]; &o&}5Aba9
b = temp[j]; J<9}) m
} #%/Jr 52<
} )EcfEym.>
} dZddoz_
feM(
/** 07\]8^/G
* @param data }h|HT
* @param l .eCUvX`$
* @param i 9niffq)h
*/ tiRi_
private void insertSort(int[] data, int start, int len) { J/rF4=j%xy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &KV$x3
} B-|C%~fe
} c0_512
} H2+V1J=
} -k%|sqDZj
ACI.{`SrQ=
堆排序： ?\<Kb|Q
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package org.rut.util.algorithm.support; H1 i+j;RN
f'tQLF[r<
import org.rut.util.algorithm.SortUtil; Z}IuR|=
+O8}twt@
/** <d[GGkY]=
* @author treeroot M=1~BZQ(Z
* @since 2006-2-2 )/z+W[t
* @version 1.0 l{\k\Q!4
*/ :>jzL8
public class HeapSort implements SortUtil.Sort{ ;0Ih:YY6
Shss};QZf(
/* (non-Javadoc) ?}S~cgL -
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZfS"
*/ dO9bxHMnM
public void sort(int[] data) { ~F;>4q
MaxHeap h=new MaxHeap(); Smd83W&
h.init(data); }kJ9<h,
for(int i=0;i h.remove(); #9A*BbY
System.arraycopy(h.queue,1,data,0,data.length); Qe]&
} Q.V+s
l\u5RMS('
private static class MaxHeap{ 3'7X[{uBr
ApcE)mjpc
void init(int[] data){ ^~3{n
this.queue=new int[data.length+1]; !F2JT@6
for(int i=0;i queue[++size]=data; kPSi6ci
fixUp(size); >^v,,R8j
} bV*q~@xh
} B"t4{1/
z:08;}t
private int size=0; 1NAtg*`
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private int[] queue; c=Zurqj
m'2EiYX$}\
public int get() { o%h[o9i
return queue[1]; #BI6+rfv|
} , lBHA+@
}dEf |6_
public void remove() { Slp_o\s$@
SortUtil.swap(queue,1,size--); `Tr !Gj_
fixDown(1); JNI&]3[C>?
} 2p*L~! iM
file://fixdown U.ew6`'Te
private void fixDown(int k) { C-(O*hK
int j; xz}=C:s
while ((j = k << 1) <= size) { LEAU3doK;
if (j < size %26amp;%26amp; queue[j] j++; LOk J
if (queue[k]>queue[j]) file://不用交换 1R#1Fy%
break; wy""02j
SortUtil.swap(queue,j,k); O5JG!bGE_F
k = j; q=k[]vD
} v5L#H=P
} TezwcFqH
private void fixUp(int k) { Xs)?PE[
while (k > 1) { )!sjXiC!h
int j = k >> 1; py\/m]
if (queue[j]>queue[k]) wNl "y
break; 8]JlYe
SortUtil.swap(queue,j,k); "g1Fg.o
k = j; @nM+*0 $d
} D Z=OZ.v
} Gx(%AB~9$
ahw0}S
} ?'OL2~
tk+t3+
} .b<wNUzP
lR^W*w4y
SortUtil： ^E3 HY@j
QhPpo#^
package org.rut.util.algorithm; :Lq=)'d;6
NOtwgZ-
import org.rut.util.algorithm.support.BubbleSort; E{'\(6z_
import org.rut.util.algorithm.support.HeapSort; (=tu~ ^
import org.rut.util.algorithm.support.ImprovedMergeSort; 8qs8QK
import org.rut.util.algorithm.support.ImprovedQuickSort; rU7t~DKS
import org.rut.util.algorithm.support.InsertSort; Hnbd<?y
import org.rut.util.algorithm.support.MergeSort; B(pHo&ox
import org.rut.util.algorithm.support.QuickSort; U> {CG+X
import org.rut.util.algorithm.support.SelectionSort; 31mlnDif
import org.rut.util.algorithm.support.ShellSort; rmdG"s
^K!R4Y4t
/** inyS4tb
* @author treeroot ?MJ5GVeH
* @since 2006-2-2 ^NO;A=9b[
* @version 1.0 z2SR/[I?
*/ _/F}y[B7d
public class SortUtil { V V Aw y6
public final static int INSERT = 1; 9<*<-x{A17
public final static int BUBBLE = 2; \6,Z<.I
public final static int SELECTION = 3; ypY7uYO^"
public final static int SHELL = 4; u6P U(f
public final static int QUICK = 5; HjX)5@"o(
public final static int IMPROVED_QUICK = 6; lDG.\u
public final static int MERGE = 7; Y= ^o {C6
public final static int IMPROVED_MERGE = 8; = 8\'AU
public final static int HEAP = 9; -V}ZbXJD
&fifOF#[e
public static void sort(int[] data) { [&{NgUgu"
sort(data, IMPROVED_QUICK); 21\?FQrz
} P)hawH=
private static String[] name={ x_x|D|@wM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9q"G g?
}; h>"Z=y
cP8@'l@!
private static Sort[] impl=new Sort[]{ Ky'\t7p u
new InsertSort(), 1)!]zV
new BubbleSort(), GoG_4:^#h
new SelectionSort(), $I90KQB\_
new ShellSort(), _2Fa.gi
new QuickSort(), f2{qj5 K
new ImprovedQuickSort(), #pX+~{
new MergeSort(), 'Ie!%k^
new ImprovedMergeSort(), M,N(be-
new HeapSort() qAuq2pHA+d
}; v5`Odbc=w
Tq5F'@e
public static String toString(int algorithm){ A;Uw b
return name[algorithm-1]; XOJ@-^BX
} X[o"9O|<
ps=QVX)YP
public static void sort(int[] data, int algorithm) { g?!;04
impl[algorithm-1].sort(data); 7>|p_o`e
} bl;v^HR0)
ZQrgYeQl"
public static interface Sort { O}"fhMk
public void sort(int[] data); 4(\7Or(''
} ?[ vC?P
w3peG^4D_
public static void swap(int[] data, int i, int j) { &bS!>_9
int temp = data; IN94[yW{1
data = data[j]; ~7&O[
data[j] = temp; y1hJVYE2
} .(zZTyZr
} 7)au#K6