[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; "BB#[@
} 8+^?<FKa
int i1=l; 2u9^ )6/
int i2=mid+1; jYwv+EXg
for(int cur=l;cur<=r;cur++){ n^QOGT.s6`
if(i1==mid+1) AF{k^^|H
data[cur]=temp[i2++]; >`rK=?12<
else if(i2>r) }qUNXE@
data[cur]=temp[i1++]; 6bL+q`3>
else if(temp[i1] data[cur]=temp[i1++]; 7?6?`no~JJ
else )k5lA=(Yr+
data[cur]=temp[i2++]; /a7tg+:
} ,e"A9ik#
} .y7&!a35
w, 0tY=h6
} j!r4p,
Ph&AP*Fq
改进后的归并排序: 3[Pa~]yS
YxMOr\B
package org.rut.util.algorithm.support; ]a% *$TF
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import org.rut.util.algorithm.SortUtil; hjiU{@q
oOk.Fq
/** B`Q.<Lqu
* @author treeroot '8~cf
* @since 2006-2-2 o l67x
* @version 1.0 '"}|'J
*/ < 4DWH
public class ImprovedMergeSort implements SortUtil.Sort { Zl]Zy}p*+
w>I>9O}(`
private static final int THRESHOLD = 10; 7^k`:Z
+Ux)m4}j
/* E-,74B&H
* (non-Javadoc) A.9,p
* W>b(hVBE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qB3{65
*/ @+",f]
public void sort(int[] data) { G'XlsyaWrb
int[] temp=new int[data.length]; bw#zMU^E
mergeSort(data,temp,0,data.length-1); 4QWDuLu
} Kb0OauW
%hU8ycI*h
private void mergeSort(int[] data, int[] temp, int l, int r) { S~vbISl
int i, j, k; ZTG*|
int mid = (l + r) / 2; ~p~8T
if (l == r) +3e(psdg
return; ]B>Y +
if ((mid - l) >= THRESHOLD) b?-%Uzp<
mergeSort(data, temp, l, mid); 5YIiO7@4
else ogv86d
insertSort(data, l, mid - l + 1); J'.:l}g!1
if ((r - mid) > THRESHOLD) ]s jFj
mergeSort(data, temp, mid + 1, r); /U<-N'|
else uF>I0J#z?
insertSort(data, mid + 1, r - mid); =SLP}bP{:
/LhAQpUQT5
for (i = l; i <= mid; i++) { /_rAy
temp = data; dQ^>,(
} Uq)|]a&e
for (j = 1; j <= r - mid; j++) { 3+m#v8h1
temp[r - j + 1] = data[j + mid]; q`09
} )8oI s
int a = temp[l]; !lE (!d3M
int b = temp[r]; Oa~t&s
for (i = l, j = r, k = l; k <= r; k++) { P]2M
if (a < b) { !U#kUj:4I
data[k] = temp[i++]; `"[VkQFB/
a = temp; aPB %6c=
} else { o_U=]mEDY
data[k] = temp[j--]; 9;Ezm<VQ
b = temp[j]; 'DF3|A],
} !-r@_tn|
} mLD0Lu_Ob3
} zsI0Q47\
T4T_32`XR
/** '9GHmtdO,
* @param data kgK7 T
* @param l }jTEgog
* @param i Js qze'BGY
*/ )8&Q.? T
private void insertSort(int[] data, int start, int len) { EA75 D&>I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _6qf>=qQ`"
} BW:&AP@B
} 5L|yF"TI#
} qB@]$
} }.gDaxj
;: Hfkyy]
堆排序： {a_=4a
z>k6T4(
package org.rut.util.algorithm.support; H7"I+qE-G
-!">SY\
import org.rut.util.algorithm.SortUtil; PiI ):B>
r0QjCFSF=
/** FqsG#6|x
* @author treeroot 3z: rUhA
* @since 2006-2-2 qYIBP?`g
* @version 1.0 EBw}/y{Kt
*/ cR$2`:e
public class HeapSort implements SortUtil.Sort{ BmUEo$w
4cJ^L <
/* (non-Javadoc) 9`.b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8nES=<rz
*/ fJOU1%
public void sort(int[] data) { u 8U>R=M
MaxHeap h=new MaxHeap(); P%pB]d.qpi
h.init(data); H` Q_gy5Z(
for(int i=0;i h.remove(); +Qu~UK\
System.arraycopy(h.queue,1,data,0,data.length); -N5r[*>
} S=[K/Kf-
A`#v-
private static class MaxHeap{ /lttJJDU
8c+i+gp!
void init(int[] data){ EPI mh
this.queue=new int[data.length+1]; Sijwh1j*V
for(int i=0;i queue[++size]=data; 4,FkA_k
fixUp(size); %S>lPt
} ,k{{ZP P
} \I#lLP
UN|"D]>/
private int size=0; ]ZO^@sH
!i_5XcH
private int[] queue; lhQ*;dMj%"
aChY5R
public int get() { lqqY5l6j
return queue[1]; ReKnvF~
} 8XX,(k_b
K"Nq_Ddwd
public void remove() { :Iwe>;}
SortUtil.swap(queue,1,size--); aU4'_%Y@
fixDown(1); E_WiQ?p
} ,2H5CFX/
file://fixdown }E8 Y,;fTD
private void fixDown(int k) { QwOQS %
int j; 'ycs{}'
while ((j = k << 1) <= size) { d^]wqnpf
if (j < size %26amp;%26amp; queue[j] j++; CNbrXN
if (queue[k]>queue[j]) file://不用交换 ?]kIztH
break; ?_\Hv@t;
SortUtil.swap(queue,j,k); F1Egcx/$V
k = j; xZ`t~4qR
} FD_0FMZ9,
} a;*&q/{o
private void fixUp(int k) { %PlPXoG=
while (k > 1) { o>U%3-+T^J
int j = k >> 1; ]3 0 7.
if (queue[j]>queue[k]) 7jts;H=
break; EW2e k^
SortUtil.swap(queue,j,k); pPQ]#v
k = j; vU{ZB^+&6o
} 2Y 6/,W
} a^Zn }R r
4pA<s-
} #J2856bzS
j?w7X?1(
} D ?,P\cp
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SortUtil： Kn\Oj=4
*WMcE$w/D
package org.rut.util.algorithm; lzS"NHs<g(
e5`{*g$i).
import org.rut.util.algorithm.support.BubbleSort; VJ_E]}H
import org.rut.util.algorithm.support.HeapSort; 9Eg'=YJ
import org.rut.util.algorithm.support.ImprovedMergeSort; \8Blq5n-O*
import org.rut.util.algorithm.support.ImprovedQuickSort; dhm;
import org.rut.util.algorithm.support.InsertSort; A FfgGO
import org.rut.util.algorithm.support.MergeSort; xu+wi>Y^
import org.rut.util.algorithm.support.QuickSort; NSHlo*)}
import org.rut.util.algorithm.support.SelectionSort; iy$]9Wf6=@
import org.rut.util.algorithm.support.ShellSort; }b\d CGVr
;'gzRC
/** lZn <v'y
* @author treeroot jgEiemh&
* @since 2006-2-2 [FyE{NfiJ%
* @version 1.0 w`#lLl B
*/ >-)i_C2
public class SortUtil { z)|56 F7'
public final static int INSERT = 1; r T*:1
public final static int BUBBLE = 2; []LNNO],X
public final static int SELECTION = 3; *"9b?`E
public final static int SHELL = 4; m?<C\&)6x
public final static int QUICK = 5; |dX#4Mq^,
public final static int IMPROVED_QUICK = 6; FpW{=4yk
public final static int MERGE = 7; L]HY*e
public final static int IMPROVED_MERGE = 8; @*%.V.
public final static int HEAP = 9; h+Dg"j<[
II~D66 bF
public static void sort(int[] data) { >DbG$V<v'
sort(data, IMPROVED_QUICK); ;Rwr5
} Z71"d"
private static String[] name={ 3j.f3~"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h ?p^DPo
}; l'3NiIX
2@e<II2ha8
private static Sort[] impl=new Sort[]{ eKStt|M'
new InsertSort(), 5vP*oD
new BubbleSort(), M6 0(yTm
new SelectionSort(), :_Ng`b/
new ShellSort(), 7sLs+|<"
new QuickSort(), JN3Oe5yB2@
new ImprovedQuickSort(), j/^0q90QO
new MergeSort(), p(Qm\g<
new ImprovedMergeSort(), )}u.b-Nt.
new HeapSort() +(|T\%$DT
}; nHT2M{R
vkBngsS
public static String toString(int algorithm){ Sl 6}5
return name[algorithm-1]; dnNc,l&g
} E}1[&
5jYRIvM[Q~
public static void sort(int[] data, int algorithm) { Ah)7A|0rT
impl[algorithm-1].sort(data); t5eux&C
} s*]1d*B!
H%])>
public static interface Sort { O'idS`
public void sort(int[] data); Sm,%>
} urog.Q
}"xC1<]
public static void swap(int[] data, int i, int j) { *;o=hM)Tp
int temp = data; p=7kFv
data = data[j]; *AxKV5[H
data[j] = temp; \:"s*-
} Sf*VkH
} ,VHvQU