[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; ;0NJX)GL
} c#>:U,j
int i1=l; t<RPDQ>
int i2=mid+1; Kaaz,C.$^
for(int cur=l;cur<=r;cur++){ A PrrUo
if(i1==mid+1) XqwP<5Z
data[cur]=temp[i2++]; .F[5{XV
else if(i2>r) d/awQXKe7
data[cur]=temp[i1++]; <I0om(P
else if(temp[i1] data[cur]=temp[i1++]; E*kZGHA
else DZA '0-
data[cur]=temp[i2++]; 5+j):_
} &JD^\+7U:
} ~QUN O~
c%&*yR
} BB ::zBg
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改进后的归并排序: Dtyw]|L\H
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package org.rut.util.algorithm.support; c?aOX/C'
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import org.rut.util.algorithm.SortUtil; TI0=nfj
JXR]G
/** 1/6}E]-F
* @author treeroot DF-.|-^9I
* @since 2006-2-2 sP~xe(
* @version 1.0 /CbiYm
*/ ,]y_[]636
public class ImprovedMergeSort implements SortUtil.Sort { NbCIL8f]
P m&^rC;
private static final int THRESHOLD = 10; 2 zG;91^
=WEDQ\ c
/* `.]oH1\
* (non-Javadoc) 2L51H(
* I1s$\NZ~]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yS3or(K
*/ H6Gs&yk3
public void sort(int[] data) { h##U=`x3
int[] temp=new int[data.length]; n</Rd=
mergeSort(data,temp,0,data.length-1); c>Ri6=C
} =Lnip<t>ja
"v0SvV<7
private void mergeSort(int[] data, int[] temp, int l, int r) { hW6Ksn,*
int i, j, k; 0kw)-)=
int mid = (l + r) / 2; 6$zd2N?
if (l == r) Eb CK9
return; A"R(?rQi=
if ((mid - l) >= THRESHOLD) g1]bI$;
mergeSort(data, temp, l, mid); {M=*>P]E
else 7s;;2<k;_
insertSort(data, l, mid - l + 1); 7) af
if ((r - mid) > THRESHOLD) JxEz1~WK &
mergeSort(data, temp, mid + 1, r); !DHfw-1K
else P^U.VXY}
insertSort(data, mid + 1, r - mid); Vock19P
7(P4KvkI
for (i = l; i <= mid; i++) { ub+XgNO
temp = data; G|||.B8
} pRUQMPn (
for (j = 1; j <= r - mid; j++) { 6z:/ma^
temp[r - j + 1] = data[j + mid]; SwaPRAF
} !XM*y
int a = temp[l]; 1s(i\&B
int b = temp[r]; `tXd?E/e
for (i = l, j = r, k = l; k <= r; k++) { %|>D{q6C
if (a < b) { Q ;5A~n
data[k] = temp[i++]; 6#\:J0
a = temp; u1d%wOY
} else { bf2r8
data[k] = temp[j--]; 2uV5hSHYe
b = temp[j]; ]v?jfy
} AS[j)x!
} CC3M7|eO3
} 1TF S2R n
BHErc\ITP
/** <(yAat$H
* @param data v!$?;"d+
* @param l wM3m'# xJ
* @param i @Pi]kWW})
*/ 2^w{Hcf
private void insertSort(int[] data, int start, int len) { .[3C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ttp%U8-LJR
} 5w+&plIJ
} c~OvoTF,
} @D `j
} H<P d&
hb %F"Q
堆排序： y9=<q%Kc-
K8_\U0 K
package org.rut.util.algorithm.support; _}T )\o
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import org.rut.util.algorithm.SortUtil; <aI}+
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/** */K]sQZa
* @author treeroot (v? rZv
* @since 2006-2-2 B7'yc`)H
* @version 1.0 Q&"oh
*/ y0/FyQs
public class HeapSort implements SortUtil.Sort{ ` K0PLxSv
]&`=p{Z
/* (non-Javadoc) ]mgpd}Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D(&WEmm\B
*/ F~bDg tN3
public void sort(int[] data) { Kc#1H|'2N
MaxHeap h=new MaxHeap(); `R-?+76?
h.init(data); 2iOYC0`!
for(int i=0;i h.remove(); ]D=fvvST
System.arraycopy(h.queue,1,data,0,data.length); )%f]P<kq6
} "V`DhOG&
In+2~Jw/2!
private static class MaxHeap{ '* /$66|
>m{>0k(^`
void init(int[] data){ RZ ?SiwE
this.queue=new int[data.length+1]; `>)pqI%L[g
for(int i=0;i queue[++size]=data; x~{W(;`!
fixUp(size); ;d]vAj
} hJz]N$@W
} Ai5+ ;8z+
cR*~JwC:
private int size=0; AEElaq.B
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private int[] queue; +ef>ek
nNnfcA&W
public int get() { =En1?3?
return queue[1]; _9Rj,
} !T8sWMY
1rLxF{,
public void remove() { #YK3Ogb,
SortUtil.swap(queue,1,size--); d3#e7rQ8
fixDown(1); {eQijW2Z3
} lQm7`+
file://fixdown 8LXK3D}?3
private void fixDown(int k) { )V*`(dn'zm
int j; ?U1Nm~'UZ
while ((j = k << 1) <= size) { :hR^?{9Z4>
if (j < size %26amp;%26amp; queue[j] j++; NX:\iJD)1U
if (queue[k]>queue[j]) file://不用交换 JLjs`oqh
break; }_@p`>|)rB
SortUtil.swap(queue,j,k); -9o7a_Z
k = j; 1F3Q^3+
} 2k&Voa
} Pt-O1$C[
private void fixUp(int k) { aYWUwYB$
while (k > 1) { wqJl[~O$
int j = k >> 1; pEX Q
if (queue[j]>queue[k]) 1&9w]\Ae7l
break; wByTNA7
SortUtil.swap(queue,j,k); 6VJS l%X
k = j; 40dwp*/!
} D>Rlm,U
} '- #QK'p
G-sQL'L[U
} A* Pz-z>z
D*sL&Rt][Y
} nHp$5|r<
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SortUtil： %P(2uesd
zvdIwV&oT
package org.rut.util.algorithm; S1C#5=
"I{Lcn~!@
import org.rut.util.algorithm.support.BubbleSort; i<=2 L?[.I
import org.rut.util.algorithm.support.HeapSort; 6KD-nr{S
import org.rut.util.algorithm.support.ImprovedMergeSort; z92Xc
import org.rut.util.algorithm.support.ImprovedQuickSort; >!tfvM2X{
import org.rut.util.algorithm.support.InsertSort; kV!1k<f
import org.rut.util.algorithm.support.MergeSort; D-x*RRkpp
import org.rut.util.algorithm.support.QuickSort; Ra:UnA
import org.rut.util.algorithm.support.SelectionSort; vmo!
import org.rut.util.algorithm.support.ShellSort; [ <k&]Kv
BJ fBYH,M
/** B7oUS}M
* @author treeroot 2=1qmQE
* @since 2006-2-2 kqq1;Kd
* @version 1.0 s;]"LD@
*/ 6q `Un}
public class SortUtil { h,b_8g{!
public final static int INSERT = 1; aOsc_5XDR;
public final static int BUBBLE = 2; %e|UA-(
public final static int SELECTION = 3; {]N7kY.W
public final static int SHELL = 4; N$.ls48a4-
public final static int QUICK = 5; 7;]IlR6
public final static int IMPROVED_QUICK = 6; M8y|Lm}o
public final static int MERGE = 7; 1(%6X*z
public final static int IMPROVED_MERGE = 8; Ub4)x
public final static int HEAP = 9; 8H8Q
\]\h,Y8
public static void sort(int[] data) { Z^mQb2e.
sort(data, IMPROVED_QUICK); /BhP`a%2Q
} 'GO*6$/
private static String[] name={ Fx)><+-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _.%g'=14f
}; n3 Rf:j^R
K 6,c||#<
private static Sort[] impl=new Sort[]{ Uv=)y^H~*A
new InsertSort(), .G"T;w6d
new BubbleSort(), XIl#0-E0X
new SelectionSort(), {>TAnb?n
new ShellSort(), x`'s
new QuickSort(), v3kT~uv
new ImprovedQuickSort(), 47A[-&y*X
new MergeSort(), 7;?7q
new ImprovedMergeSort(), s!Iinc^p
new HeapSort() h///
}; Mt%Q5^
h96<9L
public static String toString(int algorithm){ Qkw_9
return name[algorithm-1]; _p9 _Pg8
} &._Mh
>N}+O<Fc
public static void sort(int[] data, int algorithm) { 5Z#(C#
impl[algorithm-1].sort(data); s9fEx-!y
} v`:!$U* H=
.cmhi3o4
public static interface Sort { 2(Yt`3Go(
public void sort(int[] data); pF}E`U=Z
} N~S#(.}[
5p3:8G7
public static void swap(int[] data, int i, int j) { q>6,g>I
int temp = data; $d&7q5[
data = data[j]; 9,"gXsvx(
data[j] = temp; &[yYgfsp
} >gn@NJ2N
} 4]Gm4zO