[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; V%h,JA
} p0*qv"lA
int i1=l; R !g'zS'
int i2=mid+1; m%zo? e
for(int cur=l;cur<=r;cur++){ 3LGX ^J<f
if(i1==mid+1) _U.|$pU
data[cur]=temp[i2++]; G0#<SJ,)
else if(i2>r) :I_p4S.)
data[cur]=temp[i1++]; Vu.VH([b]Q
else if(temp[i1] data[cur]=temp[i1++]; &O +?#3
else OQW%nF9~
data[cur]=temp[i2++]; Kzwbr?&z
} P5Lb)9_Jw
} @k=UB&?I
0JFS%Yjw[
} &!P' M
X*cDn.(I
改进后的归并排序: 6/Iq@BZ&
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package org.rut.util.algorithm.support; Z(j"\d!y
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import org.rut.util.algorithm.SortUtil; }NjZfBQW`
Ri>4:V3K
/** nTsKJX%\
* @author treeroot Pi+pQFz5
* @since 2006-2-2 %k%%3L,
* @version 1.0 umT *
*/ 9|D*}OY>
public class ImprovedMergeSort implements SortUtil.Sort { e5RF6roxO
Q":,oZ2
private static final int THRESHOLD = 10; /< k&[
X)e#=w!fi3
/* O22Q g
* (non-Javadoc) e,kxg^
* ZnKjU ]m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IG+g7kDCY
*/ JBhM*-t(M1
public void sort(int[] data) { k5M5bH',
int[] temp=new int[data.length]; vtq$@#?~ b
mergeSort(data,temp,0,data.length-1); xU/7}='T
} |kY}G3/
rp9?p%
private void mergeSort(int[] data, int[] temp, int l, int r) { @An}
int i, j, k; g.Tc>?~
int mid = (l + r) / 2; (Bq^ D9
if (l == r) l1bkhA b
return; Y~xo=v(
if ((mid - l) >= THRESHOLD) lArKfs/
mergeSort(data, temp, l, mid); +7\d78U
else '-U&S
insertSort(data, l, mid - l + 1); ]p8zT|bv
if ((r - mid) > THRESHOLD) * N]^(+/A
mergeSort(data, temp, mid + 1, r); .k:heN2-x
else ">._&8KkE0
insertSort(data, mid + 1, r - mid); lihIPMU
X+1Mv
for (i = l; i <= mid; i++) { d-3.7nJ:
temp = data; /#WvC;B
} V7b;qC'
for (j = 1; j <= r - mid; j++) { Rk,'ujc
temp[r - j + 1] = data[j + mid]; beaSvhPU
} %afN&T
int a = temp[l]; hkb&]XWi[
int b = temp[r]; 9tX+n{i
for (i = l, j = r, k = l; k <= r; k++) { Zg$S% 1(Q
if (a < b) { i;rcgd
data[k] = temp[i++]; H;R~d%!b
a = temp; FnKC|X
} else { Fw\g\
data[k] = temp[j--]; \TZSn1isZX
b = temp[j]; e)= "Fq!
} ZNVrja*
} Sn S$5o
} b'``0OB)
z&cM8w:
/** 7Db}bDU1 |
* @param data Jd^Lnp6?
* @param l T|8:_4/l
* @param i @@j:z;^|
*/ "OwK-
private void insertSort(int[] data, int start, int len) { ]5K+W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s+~GQcj<T
} )=#e*1!b
} Esu{c9,
} j]FK.G'
} "fr{:'HX
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堆排序： h%U}Y5Ps~
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package org.rut.util.algorithm.support; $ay!'MK0d
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import org.rut.util.algorithm.SortUtil; &?1O D5
^2H;
/** dB6['z)2
* @author treeroot U?an\rv
* @since 2006-2-2 r<'DS9m
* @version 1.0 |p!($
*/ m}u)C&2>
public class HeapSort implements SortUtil.Sort{ X;H\u6-|>6
NXQ=8o9,9
/* (non-Javadoc) !zvjgDlZv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PtYG%/s
*/ IITUM)
public void sort(int[] data) { 41R6V>e@9J
MaxHeap h=new MaxHeap(); ?"*JV1 9
h.init(data); 9/!1J
for(int i=0;i h.remove(); <#J5.I 1
System.arraycopy(h.queue,1,data,0,data.length); $|xSM2
} n\)1Bz
<}:` Y"
private static class MaxHeap{ z3]W #
}tw+8YWkz
void init(int[] data){ gROK4'j6y
this.queue=new int[data.length+1]; 0^R, d M
for(int i=0;i queue[++size]=data; zz[fkH3
fixUp(size); B2oKvgw
} 'da 'WZG
} O!%T<2i3
) [?xT
private int size=0; &&m3E=K!^
d|oO2yzWv
private int[] queue; )l$}plT4
T\n6^@.>
public int get() { E_En"r)y
return queue[1]; S :8
} 70GBf"
'AX5V-t
public void remove() { 8 eK8-R$
SortUtil.swap(queue,1,size--); ~5`oNa
fixDown(1); 5?F5xiW
} t[J=8rhER
file://fixdown oz>2P.7
private void fixDown(int k) { Q&N#q53
int j; :IU7dpwDl
while ((j = k << 1) <= size) { #gqh0 27
if (j < size %26amp;%26amp; queue[j] j++; m0As t<u
if (queue[k]>queue[j]) file://不用交换 j{YYG|
break; z4:<?K
SortUtil.swap(queue,j,k); R2n 2mQ<
k = j; g\fj6
} \7i_2|w
} ;<N:!$p
private void fixUp(int k) { ?WHf%Ie2(
while (k > 1) { #H w(w
int j = k >> 1; cLl~4jL
if (queue[j]>queue[k]) u*v<dsGQ
break; :u./"[G
SortUtil.swap(queue,j,k); 7dcR@v`c
k = j; *s*Y uY%y
} ')!X1A{
} Oo@o$\+v
i4,p\rE0
} BH1h2OEe#
w^ut,`yWR
} oR&z,%0wMK
jtlRom}
SortUtil： *9"x0bth
T"[]'|'
package org.rut.util.algorithm; $GFR7YC 7
fE+zA)KX
import org.rut.util.algorithm.support.BubbleSort; 7n6g;8xE
import org.rut.util.algorithm.support.HeapSort; k1q/L|')
import org.rut.util.algorithm.support.ImprovedMergeSort; oDV6[e
import org.rut.util.algorithm.support.ImprovedQuickSort; ;o3gR4u_L
import org.rut.util.algorithm.support.InsertSort; @]vY[O!&;
import org.rut.util.algorithm.support.MergeSort; EM*I%|n@m
import org.rut.util.algorithm.support.QuickSort; P2a5<#_|
import org.rut.util.algorithm.support.SelectionSort; IGcq*mR=
import org.rut.util.algorithm.support.ShellSort; s@ r{TXEn
#M16qOEw
/** X8Q'*
* @author treeroot LXK!4(xaW
* @since 2006-2-2 8s$6R|ti
* @version 1.0 |g)C `k
*/ d(o=)!p
public class SortUtil { A}SGw.3
public final static int INSERT = 1; 0o=HOCL\
public final static int BUBBLE = 2; B6Kl_~gT
public final static int SELECTION = 3; 7bzm5w@v
public final static int SHELL = 4; lb.Q^TghU
public final static int QUICK = 5; 6sSwSS
public final static int IMPROVED_QUICK = 6; <'~m1l#2
public final static int MERGE = 7; [&n[p?
public final static int IMPROVED_MERGE = 8; QM F
public final static int HEAP = 9; :rUMmO-
L"|Bm{Run
public static void sort(int[] data) { Q2VF+g,
sort(data, IMPROVED_QUICK); o=3hWbe
} b$7]cE
private static String[] name={ ={)85N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o,`"*][wd
}; 9pqsr~
Bi:lC5d5?
private static Sort[] impl=new Sort[]{ din,yHu~
new InsertSort(), ?b,>+v-w::
new BubbleSort(), &2y4k"B&)
new SelectionSort(), ::oFL#+
new ShellSort(), Kd`(^
new QuickSort(), a)JXxst
new ImprovedQuickSort(), g[O?wH-a
new MergeSort(), d fj23+
new ImprovedMergeSort(), n"Ie>
new HeapSort() +:.Jl:fx4
}; =EP`,zqn$9
{h@\C|nF
public static String toString(int algorithm){ Or5?Gt
return name[algorithm-1]; [j+:2@
} 1IA1;
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public static void sort(int[] data, int algorithm) { #[#evlr=
impl[algorithm-1].sort(data); jW\:+Taq
} ;7lON-@BI
6P1s*u
public static interface Sort { 2'Dl$DH
public void sort(int[] data); HrBJi
} a/j;1xcc<
WR)=VE
public static void swap(int[] data, int i, int j) { ^)Hf%
int temp = data; Plp.\N%f3
data = data[j]; R@\}iyM
data[j] = temp; D*%am|QL
} eWcqf/4?"
} [CI&4)#