[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; iIg99c7/&9
} XN'<H(G
int i1=l; Fi#b0S
int i2=mid+1; U9q6m3#$
for(int cur=l;cur<=r;cur++){ q.p.y0
if(i1==mid+1) ,j\UZ
data[cur]=temp[i2++]; UC"_#!3
else if(i2>r) {s[,CUL0
data[cur]=temp[i1++]; F#7A6|
else if(temp[i1] data[cur]=temp[i1++]; IQ9Rvnna
else ~ponYc.Y
data[cur]=temp[i2++]; .BZ3>]F3<
} Uj~ :|?Wz
} 1?T^jcny:M
6XGqZ!2
} T@DT|lTI
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改进后的归并排序: Iy{&T#e"
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package org.rut.util.algorithm.support; eX{Tyd{
@{8SC~ha
import org.rut.util.algorithm.SortUtil; Qx[ nR/
&?yVLft
/** irzWk3@:
* @author treeroot o!|TCwt
* @since 2006-2-2 n6 AP6PK7
* @version 1.0 b/'RJQSAc
*/ VW\~OH
public class ImprovedMergeSort implements SortUtil.Sort { /%h<^YDBf
ITEd[ @^d
private static final int THRESHOLD = 10; nsV;6^>
}G[Qm2k
/* 9vz"rHV
* (non-Javadoc) ~ny4Ay$#
* {@`Z`h"N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +8q]O%B
*/ 5TcirVO82
public void sort(int[] data) { +J%9%DqF
int[] temp=new int[data.length]; 8w4cqr4m
mergeSort(data,temp,0,data.length-1); ,W~a%8*
} 8{J{)gF
VtC1TZ3-7
private void mergeSort(int[] data, int[] temp, int l, int r) { ;/.XAxkFL
int i, j, k; AP_2.V=Sn
int mid = (l + r) / 2; k/}E(_e
if (l == r) a$'=a09
return; Wq]Lb:&{a
if ((mid - l) >= THRESHOLD) -OV!56&
mergeSort(data, temp, l, mid); hKYA5]
else JGKiVBN
insertSort(data, l, mid - l + 1); rz3!0P!"K
if ((r - mid) > THRESHOLD) )]C7+{ImC
mergeSort(data, temp, mid + 1, r); I:%O`F
else >gTrui{,
insertSort(data, mid + 1, r - mid); mkOj&Q
9DP6g<>B
for (i = l; i <= mid; i++) { uWKc .
temp = data; fu?Y'Qet
} m\xE8D(,
for (j = 1; j <= r - mid; j++) { <xQHb^:
temp[r - j + 1] = data[j + mid]; fo30f=^Gi
} `l8^n0-
int a = temp[l]; Upkw.`D`
int b = temp[r]; jB!Q8#&Q
for (i = l, j = r, k = l; k <= r; k++) { Z&R{jQ,
if (a < b) { :3Hr:~
data[k] = temp[i++]; wWR9dsB.;
a = temp; AT4G]pT
} else { `FL!L59nz
data[k] = temp[j--]; RtVG6'Y
b = temp[j]; C@i4[g){
} #x;i R8^
} 3mnq=.<(w
} {`vv-[j|
(lY<\l
/** ^}4=pkJ;s
* @param data bl;C=n
* @param l J_^Ml)@iy
* @param i e$+?l~
*/ GY%48}7
private void insertSort(int[] data, int start, int len) { XVKR}I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2nGQD{
} 'rwnAr
} 1]uHaI(
} _n;V iQMu
} *?Sp9PixP
jI(}CT`g
堆排序： y84=Q
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package org.rut.util.algorithm.support; ,U#$Qb 12
w1+xlM,,9
import org.rut.util.algorithm.SortUtil; r-$SF5uv
|?Z;tAF!
/** `|i[*+WC
* @author treeroot GX+oA]
* @since 2006-2-2 <ZV !fn
* @version 1.0 :3# t;
*/ ;-1yG@KG
public class HeapSort implements SortUtil.Sort{ ,nELWzz%{
v<z%\`y
/* (non-Javadoc) A9[ELD>p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x;cjl6Acm
*/ x\m !3
public void sort(int[] data) { SBY
MaxHeap h=new MaxHeap(); gL+8fX2G6
h.init(data); "=uphBZog
for(int i=0;i h.remove(); eh-/,vmRa
System.arraycopy(h.queue,1,data,0,data.length); HV^*_
} +8 avA:o
$DOBC@xxzT
private static class MaxHeap{ b{KpfbxcI
9oL/oL-J/
void init(int[] data){ H"H&uA9"
this.queue=new int[data.length+1]; 6jiz$x
for(int i=0;i queue[++size]=data; pbe" w=<
fixUp(size); 'W/E*O6BY
} h<50jnH!
} A7!=`yA$
}l/!thzC
private int size=0; j`Xe0U<
R&BbXSIDX
private int[] queue; vt" 7[!O
h9,ui^#d$
public int get() { 4A_}:nU
return queue[1]; %z&=A%'a
} ]R8}cbtU
'1[}PmhD
public void remove() { +IiL(\ew
SortUtil.swap(queue,1,size--); Jp<Y2-
fixDown(1); ZlHN-!OZp
} =8?gx$r2
file://fixdown FL+^r6DQ
private void fixDown(int k) { .FS`Fh;
int j; vt3yCS
while ((j = k << 1) <= size) { _ FcfNF
if (j < size %26amp;%26amp; queue[j] j++; {"dU?/d
if (queue[k]>queue[j]) file://不用交换 E.$1CGd+
break; &>I4-D[
SortUtil.swap(queue,j,k); 777N0,o(
k = j; <j93
} uX-]z3+
} U[1Ir92:
private void fixUp(int k) { oW*e6"<R7
while (k > 1) { jjgjeY
int j = k >> 1; w1-/U+0o
if (queue[j]>queue[k]) -,t2D/xK
break; |@]`" k
SortUtil.swap(queue,j,k); }%B^Vl%ZZ
k = j; ~G!>2 +L
} F^Yt\V~T
} *%^Vq
iol.RszlZ|
} &y?L^Aq
FTx&] QN?
} Y3+GBqP
jFBLElE
SortUtil： 'OKDB7Ni
5gV%jQgkC
package org.rut.util.algorithm; |0vV?f$
UwuDs2 t
import org.rut.util.algorithm.support.BubbleSort; _VFxzM9f
import org.rut.util.algorithm.support.HeapSort; #\kYGr-G)
import org.rut.util.algorithm.support.ImprovedMergeSort; %Y"@VcN
import org.rut.util.algorithm.support.ImprovedQuickSort; [:geDk9O#'
import org.rut.util.algorithm.support.InsertSort; Tti]H9g_
import org.rut.util.algorithm.support.MergeSort; Cf'O*RFD
import org.rut.util.algorithm.support.QuickSort; =FkU:q$
import org.rut.util.algorithm.support.SelectionSort; $*ujX,}xG
import org.rut.util.algorithm.support.ShellSort; zT[[WY4
s7?Q[vN
/** \e%H5Wx
* @author treeroot v:c_q]z#B
* @since 2006-2-2 W8:?y*6
* @version 1.0 x j6-~<
*/ _@[M0t}g_
public class SortUtil { $~xY6"_}!!
public final static int INSERT = 1; ;Ub;AqY
public final static int BUBBLE = 2; `wt*7~'=
public final static int SELECTION = 3; &h.E B
public final static int SHELL = 4; ^NB@wuf7
public final static int QUICK = 5; "wi=aV9j
public final static int IMPROVED_QUICK = 6; Iy\{)+}aS
public final static int MERGE = 7; pCOr{I\
public final static int IMPROVED_MERGE = 8; =k#SQ/@
public final static int HEAP = 9; L0?-W%$>
LOf0_g/
public static void sort(int[] data) { fS50
sort(data, IMPROVED_QUICK); KUG\C\z6=
} `<>Emc8Z
private static String[] name={ irSdqa/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7@R;lOzL3
}; !BD+H/A.{
sfSM7f
private static Sort[] impl=new Sort[]{ VU7x w
new InsertSort(), kH Y
new BubbleSort(), $+eDoI'f
new SelectionSort(), ^&iUC&8W
new ShellSort(), +Z0@z^6\
new QuickSort(), (,~gY=E+
new ImprovedQuickSort(), 9s\;,!b
new MergeSort(), ek~bXy{O`
new ImprovedMergeSort(), XJl2_#
new HeapSort() *rPUVhD_
}; 5a1)`2V2M
iGmBG1a\
public static String toString(int algorithm){ CN6@g^)P
return name[algorithm-1]; :*V1jp+
} ^;0.P)yGA
3dG[dYj
public static void sort(int[] data, int algorithm) { ^a~^$PUqI
impl[algorithm-1].sort(data); ~W'>L++
} \^9SuZ
uop|8n1
public static interface Sort { f5jxF"oGNo
public void sort(int[] data); Q70LQCms
} %\8E{M:
]J\tosTi
public static void swap(int[] data, int i, int j) { (Hqy^EOZ
int temp = data; V3&_ST
data = data[j]; _idTsd:\
data[j] = temp; O-r,&W
} j_ dCy
} Nq|b$S[4