[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; h>L6{d1
} ~qLhZR\g^
int i1=l; (W}i287
int i2=mid+1; +}G>M=t::
for(int cur=l;cur<=r;cur++){ qI V`zZc
if(i1==mid+1) I8-&.RE
data[cur]=temp[i2++]; _>?8eC]4a
else if(i2>r) RfKxwo|M<
data[cur]=temp[i1++]; a,0o{*(u$
else if(temp[i1] data[cur]=temp[i1++]; eed\0
else \'^Z_6{w
data[cur]=temp[i2++]; `aWwF} +Y
} 6 peM4X
} 1Sc~Vb|>
^)0{42!]
} ;u-< {2P
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改进后的归并排序: n`I jG
5@&i:vs5y
package org.rut.util.algorithm.support; W!Ct[t
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import org.rut.util.algorithm.SortUtil; 23n8,} H,
j>Bk;f|
/** +KwF U
* @author treeroot kq.R(z+
* @since 2006-2-2 j n&9<"W
* @version 1.0 |Nd.'|g,
*/ PA-0FlV|
public class ImprovedMergeSort implements SortUtil.Sort { C2,cyhr
buM>^A"
private static final int THRESHOLD = 10; Y"\T*lKa
\3Ald.EqtM
/* d<cbp[3F
* (non-Javadoc) vheAh`u^&
* AU?YZEAei
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #pn AK
*/ 7Caap/L:
public void sort(int[] data) { 7;s0m0<%~
int[] temp=new int[data.length]; .N><yQ-j3'
mergeSort(data,temp,0,data.length-1); E,?aBRxy
} EV,NJ3V
tlxjs]{0E
private void mergeSort(int[] data, int[] temp, int l, int r) { P;91C'T-x
int i, j, k; ps;o[gB@5
int mid = (l + r) / 2; 8}`8lOE7
if (l == r) o?hw2-mH
return; 1#_j6Q2
if ((mid - l) >= THRESHOLD) AA%g^PWpR
mergeSort(data, temp, l, mid); j<-o{6r
else }~,cCtg:o
insertSort(data, l, mid - l + 1); \^W?
if ((r - mid) > THRESHOLD) oW1olmpp=
mergeSort(data, temp, mid + 1, r); ~map5@Kd
else [ Zqg"`
insertSort(data, mid + 1, r - mid); #K*q(ei,7h
CbaAnm1
for (i = l; i <= mid; i++) { 7 ,~Krzv
temp = data; 3A/MFQ#2
} {j4:.fD
for (j = 1; j <= r - mid; j++) { ieoUZCO^r\
temp[r - j + 1] = data[j + mid]; {"AYOc>2|
} g#nsA(_L
int a = temp[l]; Bq=](<>>
int b = temp[r]; ]1$AAmQH
for (i = l, j = r, k = l; k <= r; k++) { UdgI<a~`k6
if (a < b) { EGO@`<"h
data[k] = temp[i++]; uXa}<=O
a = temp; bGnJ4R3J
} else { \V\ET
data[k] = temp[j--]; 4tu>~ vOE
b = temp[j]; RwHXn]1
} yAkN2
} =umS^fJ5`
} *njB fH'
`erQp0fBM
/** e%7P$.
* @param data WoR**J?}w
* @param l {%}6d~Bg
* @param i :#KURYO<
*/ O@&I.d$
private void insertSort(int[] data, int start, int len) { *#9kFz-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [NDYJ'VGe
} u3!!_~6,z
} \zDV|n~{w
} @TG~fJSA12
} 780MSFV8
AU\!5+RDB
堆排序： S8<aq P
f}d@G/L
package org.rut.util.algorithm.support; (G'ddZAJV
g 0=t9J
import org.rut.util.algorithm.SortUtil; *Y?]="8c#;
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/** JYUKs~Qt
* @author treeroot SX8%F:<.
* @since 2006-2-2 t')I c6.?i
* @version 1.0 CtxK{:
*/ y[eNM6p
public class HeapSort implements SortUtil.Sort{ qA[}\8}h
RH'R6
/* (non-Javadoc) {$.{VE+v5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l)bUHh5[
*/ Xb;`WE gC
public void sort(int[] data) { o4795r,jz
MaxHeap h=new MaxHeap(); r73Xh"SL
h.init(data); yV`vu/3K
for(int i=0;i h.remove(); Fv B2y8&W
System.arraycopy(h.queue,1,data,0,data.length); W`kgYGnFG
} Ha\hQ'99
bZJiubBRI
private static class MaxHeap{ o)DKP>IM#
CQ ?|=cN
void init(int[] data){ =="SW"vNi
this.queue=new int[data.length+1]; IS~oyFS
for(int i=0;i queue[++size]=data; -ybupUJcbv
fixUp(size); n9ih^H
} 6<R U~Gh
} iBt5aUt
l0V@19Ec
private int size=0; !Ai;S
<z PyID`
private int[] queue; &aU+6'+QXB
6w#v,RDEu
public int get() { .l!Z=n|
return queue[1]; ~<3yTl>
} rCYn YA
2 r)c?
public void remove() { UgJHSl
SortUtil.swap(queue,1,size--); BDg /pDnwg
fixDown(1); /:)4tIV
} +iR;D$w
file://fixdown *BV .zbGm
private void fixDown(int k) { ?T"crX
int j; :A[/;|&
while ((j = k << 1) <= size) { Gy5W;,$q
if (j < size %26amp;%26amp; queue[j] j++; '_%Jw:4k
if (queue[k]>queue[j]) file://不用交换 fr7/%{s
break; H+Wd#7l,
SortUtil.swap(queue,j,k); ))vwofkw4
k = j; [S%
} f\JyN@w+
} jdzV&
private void fixUp(int k) { \`^jl
while (k > 1) { d>}%A ]
int j = k >> 1; utXcfKdt
if (queue[j]>queue[k]) okW3V}/x/z
break; gVc[`(@h
SortUtil.swap(queue,j,k); "#()4.9
k = j; }`X$ '
} )8_0d)
} F&\o1g-L
UTz;Sw?~hw
} BdTj0{S1u
Jg:'gF]jt
} :5(TOF
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SortUtil： mMR[(
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package org.rut.util.algorithm; Kr<O7t0X
N\u-8nE5
import org.rut.util.algorithm.support.BubbleSort; S'WmPv
import org.rut.util.algorithm.support.HeapSort; R#t~i&v/
import org.rut.util.algorithm.support.ImprovedMergeSort; z<ek?0?yS
import org.rut.util.algorithm.support.ImprovedQuickSort; &HE8O}<>
import org.rut.util.algorithm.support.InsertSort; C'Ymz`iQ
import org.rut.util.algorithm.support.MergeSort; IRQ(/:]
import org.rut.util.algorithm.support.QuickSort; 1Dbe0u
import org.rut.util.algorithm.support.SelectionSort; 6*e:ey U
import org.rut.util.algorithm.support.ShellSort; I|.B-$gH
%w@(V([(c
/** w-KtxG(
* @author treeroot ]KfHuYjM
* @since 2006-2-2 UY==1\
* @version 1.0 GV9"8MZ6
*/ b~|B(lL6Xm
public class SortUtil { +5Mx0s(5
public final static int INSERT = 1; BH}u\K
public final static int BUBBLE = 2; \+,jM6l}-
public final static int SELECTION = 3; 33; ytd
public final static int SHELL = 4; 5W'T7asOh
public final static int QUICK = 5; d+bTRnL
public final static int IMPROVED_QUICK = 6; Pvtf_Qo^
public final static int MERGE = 7; @a~K#Bvlm
public final static int IMPROVED_MERGE = 8; (YR1ML3N
public final static int HEAP = 9; .8,lhcpY
+n0y/0Au
public static void sort(int[] data) { {{O1C~
sort(data, IMPROVED_QUICK); g><sZqj8tt
} GUK/Xiu
private static String[] name={ ,e;(\t:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" shi#K<gVC
}; rsP1?Hxq
X<1# )xC
private static Sort[] impl=new Sort[]{ +pE-Yn`YS
new InsertSort(), T# 8O:
new BubbleSort(), <@?bYp
new SelectionSort(), >FY`xl\m}<
new ShellSort(), kweypIB
new QuickSort(), ;}r#08I
new ImprovedQuickSort(), l<gg5 Zea
new MergeSort(), U?kJXM2
new ImprovedMergeSort(), d9E:LZy
new HeapSort() SL*B `P~{
}; fFsA[@5tul
_G`kj{J
public static String toString(int algorithm){ kQYX[e7n
return name[algorithm-1]; E")82I
} A$ s4Q0Mf
$oh}!Smt
public static void sort(int[] data, int algorithm) { &u.t5m7(
impl[algorithm-1].sort(data); kMUjSa~\
} ab6KK$s
>R :Bkf-
public static interface Sort { h_H$+!Nzb
public void sort(int[] data); "/wZtc
} v\&Wb_;A
6VIi nuOW
public static void swap(int[] data, int i, int j) { z`'{l{
int temp = data; )/Ul"QF
data = data[j]; q*52|?
data[j] = temp; dZ_Hj X7
} ]M#_o]
} U@DIO/C,m`