[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; 6XK`=ss?
} %P,^}h7
int i1=l; 4$GRCq5N;
int i2=mid+1; A;a(n\Sy
for(int cur=l;cur<=r;cur++){ /~cL L
if(i1==mid+1) VhIIW"1
data[cur]=temp[i2++]; gD+t'qg$
else if(i2>r) 59BHGvaF
data[cur]=temp[i1++]; c$:=d4t5$
else if(temp[i1] data[cur]=temp[i1++]; Pt0}9Q
else (G%gVk]
data[cur]=temp[i2++]; [Ms{J!^q
} WTv\HI2X !
} I jztj
DLVs>?Y
} [HiTR!o*
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改进后的归并排序: ||ZufFO
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package org.rut.util.algorithm.support; gJ8 c]2c
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import org.rut.util.algorithm.SortUtil; 0QH3,Ps1C
h]DECd{
/** MGyB8(
* @author treeroot KXA)i5z
* @since 2006-2-2 l@/kPEh
* @version 1.0 aC Lg~g4
*/ y{I[}$k
public class ImprovedMergeSort implements SortUtil.Sort { 8Pr7aT:,
#L= eK8^e
private static final int THRESHOLD = 10; iA{jKk=
r5da/*G/O
/* ~G:2iSi(#
* (non-Javadoc) v[DbhIXU
* 8|qB1fB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C5PBfn<j
*/ 6 %k+0\d
public void sort(int[] data) { +y4AUU:Q
int[] temp=new int[data.length]; 1 u_24
mergeSort(data,temp,0,data.length-1); .C;_4jE
} xP6?es`
-@V"i~g<e
private void mergeSort(int[] data, int[] temp, int l, int r) { FO>(QLlH
int i, j, k; H?(SSL
int mid = (l + r) / 2; KPd C9H
if (l == r) :8-gm"awL5
return; KW7?: x
if ((mid - l) >= THRESHOLD) ZMMo6;
mergeSort(data, temp, l, mid); j484b2uj1
else bb/?02*)H
insertSort(data, l, mid - l + 1); ytV)!xe
if ((r - mid) > THRESHOLD) qM!f
mergeSort(data, temp, mid + 1, r); xm,`4WdG
else V;hwAQbF
insertSort(data, mid + 1, r - mid); [H:GKhPC`
Z*9]:dG:!
for (i = l; i <= mid; i++) { , 64t
temp = data; ]baaOD$Z
} ]F*a PV
for (j = 1; j <= r - mid; j++) { m_Ac/ctf
temp[r - j + 1] = data[j + mid]; Ao,!z
} O][Nl^dl
int a = temp[l]; i$^B-
int b = temp[r]; Xz.Y-5)
for (i = l, j = r, k = l; k <= r; k++) { "3i80R\w`F
if (a < b) { _X2EBpZp
data[k] = temp[i++]; fxoi<!|iGY
a = temp; Ag4Ga?&8ec
} else { -6~y$c&c
data[k] = temp[j--]; 1.95 ^8
b = temp[j]; eBC%2TF
} YaNH.$.:
} #W%)$kc
} ^?7dOW
I`'a'
/** UUMdZ+7
* @param data Jg|cvu-+
* @param l {pb9UUP2
* @param i H&=n:'k^
*/ \9(- /rE
private void insertSort(int[] data, int start, int len) { ;64mf`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (YYj3#|
} 8lWH=kA\
} :9F''f$AP
} :IVk_[s
} 8hKP
4OOn,09
堆排序： <{cNgKd9
JYg% ~tW'
package org.rut.util.algorithm.support; Y%0d\{@a
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import org.rut.util.algorithm.SortUtil; mo;)0Vq2l
p>:ef<.i
/** G=Hf&l
* @author treeroot z{@R.'BD
* @since 2006-2-2 *|k;a]HT
* @version 1.0 5Z9~ &U
*/ Z<ajET`)
public class HeapSort implements SortUtil.Sort{ K/2.1o;9
{;&B^uz ]
/* (non-Javadoc) UIf ZPf=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WfRfx#MMt
*/ S~k*r{?H})
public void sort(int[] data) { R>d@tr
MaxHeap h=new MaxHeap(); .5Knbc
h.init(data); )XP#W|;
for(int i=0;i h.remove(); nJleef9
System.arraycopy(h.queue,1,data,0,data.length); )>y k-
} ^.D}k
a;"Uz|rz
private static class MaxHeap{ ^IVe[P'
&@% b?~
void init(int[] data){ (rr}Pv%yb
this.queue=new int[data.length+1]; Gg9VS&VI
for(int i=0;i queue[++size]=data; j1puB
fixUp(size); -Aa]aDAz68
} zUs~V`0
} `k(u:yGK
ok`]:gf
private int size=0; T0`"kjE
]^:hyOK
private int[] queue; g@@&sB-A"
6P~aW
public int get() { gwSN>oj &
return queue[1]; g/8.W
} )RwBg8
}pMP!%|
public void remove() { "F-Y^
SortUtil.swap(queue,1,size--); 6ORY`Pe7P|
fixDown(1); c[VrC+e m
} xMDrE?
file://fixdown LY-lTr@A^
private void fixDown(int k) { }iilzE4oH#
int j; 9<|m4
while ((j = k << 1) <= size) { U_}7d"<| ?
if (j < size %26amp;%26amp; queue[j] j++; B(j02<-
if (queue[k]>queue[j]) file://不用交换 F#(.v7Za
break; z,{e]MB)M
SortUtil.swap(queue,j,k); N5nvL)a~
k = j; 8RdP:*HY
} y(bsCsV&
} 'h-3V8m^e
private void fixUp(int k) { O)`fvpVU
while (k > 1) { Bx(yu'g|a
int j = k >> 1; [N)#/6j
if (queue[j]>queue[k]) oi2J:Y4
break; 2Co@+I[,4&
SortUtil.swap(queue,j,k); j2|XDOf
k = j; J&M1t#UN
} 5kcJ
} 6*ZU}xT
[}>#YPZ
} c[SU5 66y
HWqLcQ d:P
} [tUv*jw%
"JkZJ#
SortUtil： ZCm1+Y$
L@w0N)P<!{
package org.rut.util.algorithm; )`w=qCn1Y
q0&Wk"X%rr
import org.rut.util.algorithm.support.BubbleSort; AD^X(rW
import org.rut.util.algorithm.support.HeapSort; z|ves&lRa
import org.rut.util.algorithm.support.ImprovedMergeSort; cDCJ]iDs
import org.rut.util.algorithm.support.ImprovedQuickSort; _N98vf0o
import org.rut.util.algorithm.support.InsertSort; ]Ap`
import org.rut.util.algorithm.support.MergeSort; z@zD .
import org.rut.util.algorithm.support.QuickSort; <^xfcYx\
import org.rut.util.algorithm.support.SelectionSort; L 5+J ^
import org.rut.util.algorithm.support.ShellSort; W1vCN31
Fse['O~
/** q"S(7xWS
* @author treeroot SO`dnf
* @since 2006-2-2 U\Ct/U&A?
* @version 1.0 < CDA"
*/ z^r|3;
public class SortUtil { m$,,YKhh
public final static int INSERT = 1; Rab#7Q16Q8
public final static int BUBBLE = 2; 9Uk(0A
public final static int SELECTION = 3; /I`3dWL
public final static int SHELL = 4; ;Xqn-R
public final static int QUICK = 5; d7* CwY9"
public final static int IMPROVED_QUICK = 6; B={/nC}G~
public final static int MERGE = 7; kl" ]Nw'C
public final static int IMPROVED_MERGE = 8; W9dYljnZ8i
public final static int HEAP = 9; q69H^E=
Y;} 2'"
public static void sort(int[] data) { yz?q(]
sort(data, IMPROVED_QUICK); _zq)0\
} 1!!\+ c2*
private static String[] name={ MU|{g 5/ )
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ls]@icH0
}; r*chL&7
i^WIr h3a
private static Sort[] impl=new Sort[]{ lzEb5mg
new InsertSort(), W6vf=I@f
new BubbleSort(), lWbZ=x_0
new SelectionSort(), G]4OFz+
new ShellSort(), q/$GE,"
new QuickSort(), \^LWCp,C"
new ImprovedQuickSort(), 1]j^d
new MergeSort(), > @+#
new ImprovedMergeSort(), a5a1'IVq
new HeapSort() !i^]UN
}; >V(zJ
|Ab{H%
public static String toString(int algorithm){ SET-8f
return name[algorithm-1]; Txo@U
} ,;%yf?
iX%[YQ |
public static void sort(int[] data, int algorithm) { lV\lj@
impl[algorithm-1].sort(data); 6UlF5pom
} ACb/ITu
s"i~6})K<$
public static interface Sort { ,t1vb3
public void sort(int[] data); (= 9wo
} hT'=VN
J*j5#V];
public static void swap(int[] data, int i, int j) { =h|wwQE
int temp = data; K#!X><B'
data = data[j]; +dw!:P&
data[j] = temp; %hc'dZ
} D<t~e$H
} SauH>