[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; A"T*uv|
} T]?QCf
int i1=l; B3yp2tncj
int i2=mid+1; +w+qTZyky
for(int cur=l;cur<=r;cur++){ xcN >L
if(i1==mid+1) ]dHV^!
data[cur]=temp[i2++]; Mh5 =]O+
else if(i2>r) xJ)vfo
data[cur]=temp[i1++]; R1\$}ep^
else if(temp[i1] data[cur]=temp[i1++]; -;t]e6[
else fYgX|#Me
data[cur]=temp[i2++]; K[i|OZWu
} nNcmL/(
} u/4|Akui
zbP#y~[
} /N`E4bKBR
lISu[{b?
改进后的归并排序: 3EX41)u
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package org.rut.util.algorithm.support; oW8 hC
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import org.rut.util.algorithm.SortUtil; [X=Ot#?u ~
}aa ~@K<A
/** ch]Q%M
* @author treeroot ' Y.s}Duj
* @since 2006-2-2 @W*Zrc1NF
* @version 1.0 c>e~$b8
*/ F anA~
public class ImprovedMergeSort implements SortUtil.Sort { S-)%#
BW%"]J
private static final int THRESHOLD = 10; fm'Qifq^
( O/+.qb
/* 0:3<33]x
* (non-Javadoc) 0x8aKq\'
* P6o-H$ a+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P7kb*
*/ 6WX+p3Kv
public void sort(int[] data) { ue#Yh
int[] temp=new int[data.length]; @@Vf"o+S
mergeSort(data,temp,0,data.length-1); ~<w9a]
} }u8D5Q<(
=H2.1 :'
private void mergeSort(int[] data, int[] temp, int l, int r) { qlfYX8edZ
int i, j, k; ,-{2ai_
int mid = (l + r) / 2; xt"GO b
if (l == r) 3re|=_ Hy
return; \~bE|jWbj
if ((mid - l) >= THRESHOLD) '1yy&QUZq
mergeSort(data, temp, l, mid); (@1*-4l
else hh>mX6A
insertSort(data, l, mid - l + 1); ckPI^0A!
if ((r - mid) > THRESHOLD) f")*I
mergeSort(data, temp, mid + 1, r); J|2OmbJe
else QGV~Y+
insertSort(data, mid + 1, r - mid); ?$LKn2C
b ZEyP W
for (i = l; i <= mid; i++) { !{L`Zd;C>w
temp = data; +yd(t}H@
} F,-S&d
for (j = 1; j <= r - mid; j++) { E>3fk
temp[r - j + 1] = data[j + mid]; `CQMvX{
} Wg2Y`2@t
int a = temp[l]; l4s_9
int b = temp[r]; %8lF%uu!x
for (i = l, j = r, k = l; k <= r; k++) { K@zzseQ}=
if (a < b) { pC'GKk 8
data[k] = temp[i++]; =D2x@ank[
a = temp; < l%3P6|
} else { x0!5z1KQh
data[k] = temp[j--]; ;Y>cegG\
b = temp[j]; $!_]mz6*
} , 1{)B
} uM9[
} jTJ]: EN
Z;#Ei.7p|
/** -6KGQc}U
* @param data :LwNOuavN
* @param l h[0,/`qb{
* @param i :5`BhFAd
*/ ?E?dg#yk
private void insertSort(int[] data, int start, int len) { $G5;y>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yprf `D>
} tj_+0J$sw:
} &[hq !v
} &k+'TcWm
} 6n.W5 1g(s
*M_Gu{xc
堆排序： 1MCHwX3/
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package org.rut.util.algorithm.support; FaNH+LPe
)TBG-<wt
import org.rut.util.algorithm.SortUtil; \e/'d~F
9j[%Y?
/** /v1Rn*VF!
* @author treeroot D$RQD{*
* @since 2006-2-2 9 1r"-%(r
* @version 1.0 ^p0BeSRiy;
*/ FasA f(3
public class HeapSort implements SortUtil.Sort{ {yy^DlHb
yH8 N8
/* (non-Javadoc) : qKxm(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Zx+DW cq
*/ O&!tW^ih
public void sort(int[] data) { U. 1Vpfy
MaxHeap h=new MaxHeap(); xrK%3nA4s"
h.init(data); MU^7(s="
for(int i=0;i h.remove(); /2&jId
System.arraycopy(h.queue,1,data,0,data.length); b0CtQe
} hY.zwotH
|-hzvuSX
private static class MaxHeap{ #KonVM(`
rlvo&(a
void init(int[] data){ T6|zT}cb
this.queue=new int[data.length+1]; O7shY4Sr
for(int i=0;i queue[++size]=data; T3o}%wGW
fixUp(size); 'Dq!o[2y
} 7B$iM,}.b
} ?6!7fs,
(L?fYSP!
private int size=0; yFT)R hN
"$?f&*
private int[] queue; ?#^_yd|<
Z4Nl{ 6
public int get() { bGvALz'
return queue[1]; \d0R&vFHQ
} Z~tOR{q
D5]sf>~
public void remove() { oXgKuR
SortUtil.swap(queue,1,size--); {|%N
fixDown(1); %v\0Dm+A
} A-O@e e
file://fixdown U3 e3
private void fixDown(int k) { +k'5W1e
int j; ) =<,$|g
while ((j = k << 1) <= size) { w<*tbq
if (j < size %26amp;%26amp; queue[j] j++; >_1*/o JO
if (queue[k]>queue[j]) file://不用交换 zxtx~XO
break; cjU*
SortUtil.swap(queue,j,k); c<j2wKz
k = j; DKCPi0
} \FSkI0
} euS"C*
private void fixUp(int k) { (xJ6: u
while (k > 1) { 0(;d<u)fS
int j = k >> 1; Efb>ZQ
if (queue[j]>queue[k]) bE2^sx`(
break; k~u$&a
SortUtil.swap(queue,j,k); xT I&X9P
k = j; 0A@'w*=
} 5B!l6ST
} uYlC*z{
jRS0(8
} /i$ mIj`
^0R.U+?+
} <8[BB7
Z&%#,0>]
SortUtil： w4 <FC$
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package org.rut.util.algorithm; vBUx)l
2/qP:3)
import org.rut.util.algorithm.support.BubbleSort; "#2z 'J
import org.rut.util.algorithm.support.HeapSort; S*6P=O*
import org.rut.util.algorithm.support.ImprovedMergeSort; 1Tf"<Dp
import org.rut.util.algorithm.support.ImprovedQuickSort; pGz-5afL
import org.rut.util.algorithm.support.InsertSort; sTO*
import org.rut.util.algorithm.support.MergeSort; q_5k2'4K
import org.rut.util.algorithm.support.QuickSort; 'D8WNZ8Q
import org.rut.util.algorithm.support.SelectionSort; D[m;rcl
import org.rut.util.algorithm.support.ShellSort; Ns2M8
>&tPIrz
/** V<AT"vU[
* @author treeroot 3qPj+@
* @since 2006-2-2 j0!Z 20
* @version 1.0 m]BxGwT=m
*/ A^2VH$j]+
public class SortUtil { 3(':4Tas
public final static int INSERT = 1; U[=VW0
public final static int BUBBLE = 2; _h!OGLec
public final static int SELECTION = 3; /c~z(wv
public final static int SHELL = 4; ]'=]=o~4
public final static int QUICK = 5; u~\u8X3
public final static int IMPROVED_QUICK = 6; S1&mY'c
public final static int MERGE = 7; dJM)~Ay-
public final static int IMPROVED_MERGE = 8; wp`a:QZ8N
public final static int HEAP = 9; ["4h%{.
3(G}IWPq<
public static void sort(int[] data) { Y"~I(,nx!
sort(data, IMPROVED_QUICK); )y(pd
} WF<`CQg[
private static String[] name={ 40N8?kQ}?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5BCXI8Ox9x
}; hex:e2x
W[[3'JTF
private static Sort[] impl=new Sort[]{ D)XF@z;
new InsertSort(), Eym<DPu$n
new BubbleSort(), 6+(g4MW
new SelectionSort(), ,qV8(`y_
new ShellSort(), f8kPbpV,
new QuickSort(), pi:%Bd&F
new ImprovedQuickSort(), -`gqA%#+
new MergeSort(), Ub*Gv(Pg
new ImprovedMergeSort(), zE5%l`@|o
new HeapSort() W/9dT^1y4'
}; BRbx.
-;cZW.<
public static String toString(int algorithm){ C1^=se
return name[algorithm-1]; 7A?~a_Ep
} 1GKd*z
[!p>Id
public static void sort(int[] data, int algorithm) { -?`^^v
impl[algorithm-1].sort(data); cq+|fg~Yy
} 6Y0k}+j|>E
SuU,SE'TX
public static interface Sort { n=l>d#}$%T
public void sort(int[] data); J`a$"G B.
} Aa-L<wZVPt
fOCLN$x^
public static void swap(int[] data, int i, int j) { 4%1sOnl
int temp = data; hIu;\dfwk
data = data[j]; N|5J-fR&
data[j] = temp; H=[eO
} #z_lBg. K
} >&3M #s(w