[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; ~]t2?SqNm
} yI)RGOV
int i1=l; `- uZv
int i2=mid+1; (^@;`8Dy8
for(int cur=l;cur<=r;cur++){ 3\U,Kg
if(i1==mid+1) ?U.&7yY
data[cur]=temp[i2++]; Bbe/w#Z
else if(i2>r) N4GIb 6
data[cur]=temp[i1++]; uzn))/"
else if(temp[i1] data[cur]=temp[i1++]; /EAQ.vxI
else N6 }i>";_;
data[cur]=temp[i2++]; kI1{>vYD
} ?RjKP3P
} %~v76;H<
bMK'J
} Wn9Mr2r!*,
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改进后的归并排序: fN? Lz%z3
v.8S V]
package org.rut.util.algorithm.support; .qU%SmQ^
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import org.rut.util.algorithm.SortUtil; kHIQ/\3?Q
mYs->mg1
/** G QB^
* @author treeroot HI`A;G]
* @since 2006-2-2 ~Sem_U`G
* @version 1.0 '' A[`,3
*/ MAhPO!e5.
public class ImprovedMergeSort implements SortUtil.Sort { $R#L@iL-
8@C|exAD`
private static final int THRESHOLD = 10; 5<GRi"7A@
<?va) ou
/* =rtA{g$)+
* (non-Javadoc) a*wJcJTpV"
* x jUH<LFxy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -"^WDs
*/ OQb9ijLeK
public void sort(int[] data) { O=?X%m #
int[] temp=new int[data.length]; y.]]V"'2
mergeSort(data,temp,0,data.length-1); ((IBaEq
} RlPByG5K
(/P&;?j
private void mergeSort(int[] data, int[] temp, int l, int r) { ke6cZV5w
int i, j, k; YV!V9
int mid = (l + r) / 2; oX]1>#5UMg
if (l == r) 25@j2K(
return; L}S4Zz18
if ((mid - l) >= THRESHOLD) O?J:+L(
mergeSort(data, temp, l, mid); M{kh=b)V
else .nY6[2am
insertSort(data, l, mid - l + 1); g4qdm{BL
if ((r - mid) > THRESHOLD) xwp?2,<
mergeSort(data, temp, mid + 1, r); WatLAn+
else 5nIlG
insertSort(data, mid + 1, r - mid); qO3BQ]UF
^E?V+3mV
for (i = l; i <= mid; i++) { 4 AmF^H
temp = data; JY8"TQ$x
} %[CM;|?B4
for (j = 1; j <= r - mid; j++) { {EHG |
temp[r - j + 1] = data[j + mid]; =X'7V}Q}
} w3cK: C0
int a = temp[l]; rxk{Li<9
int b = temp[r]; \osQwGPV
for (i = l, j = r, k = l; k <= r; k++) { :Ty*i
if (a < b) { +&8Ud8Q
data[k] = temp[i++]; :\;uJ5
a = temp; ->9xw
} else { "@?kxRn!
data[k] = temp[j--]; cQ ;Ry!$
b = temp[j]; x{o5Ha{
} uiEA=*axp
} 54DR.>O
} /<(ik&%N
2/q=l?
/** ]<z(Rmn`Q
* @param data ffd3QQ
* @param l ]c=1-Rl
* @param i 0BD((oNg
*/ (SVr>|Db
private void insertSort(int[] data, int start, int len) { &+iW:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D)Rf
} 0lh6b3tdP
} yC*BOJS
} 1)r_h(
} U+M?<4J)"
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堆排序： 0\^2HjsJ
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package org.rut.util.algorithm.support; &nw~gSe
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import org.rut.util.algorithm.SortUtil; ZTC1t_
z6r/ w
/** ,PxQ[CGg
* @author treeroot wo9f99
* @since 2006-2-2 [mvHa;-w
* @version 1.0 3+uoK f[
*/ XB 7^Ka
public class HeapSort implements SortUtil.Sort{ uL AXN
" CoR?[,x
/* (non-Javadoc) ,]qX_`qF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .g?,:$`0D?
*/ !_!b\
public void sort(int[] data) { C>VZf,JE1
MaxHeap h=new MaxHeap(); x}j41E}
h.init(data); o@;_(knb
for(int i=0;i h.remove(); Y &+/[[
System.arraycopy(h.queue,1,data,0,data.length); )B4c;O4t
} DQnWLC"u
!\4FIs&Qv
private static class MaxHeap{ Pk_{{Z(1o
=@
void init(int[] data){ T^G<)IX`c
this.queue=new int[data.length+1]; N\&;R$[9:
for(int i=0;i queue[++size]=data; ,^C;1ph
fixUp(size); xhS/X3<th
} ENjD~S
} uelTsn
EIm\!'R]
private int size=0; R?SHXJ%'
cLP@0`^H
private int[] queue; kn|l3+
U8z"{
public int get() { X#<Sv>c^
return queue[1]; ^k##a-t<_>
} Jz'+@q6h
@'4D9A
public void remove() { r!iuwE@
SortUtil.swap(queue,1,size--); h!GixN?
fixDown(1); ~C x2Q4E
} Jj:4@p:
file://fixdown +,>bpp1
private void fixDown(int k) { D<6kAGE
int j; #::vMnT
while ((j = k << 1) <= size) { hZJqo +s
if (j < size %26amp;%26amp; queue[j] j++; *X=-^\G
if (queue[k]>queue[j]) file://不用交换 W7"sWaOhW
break; !{;RtUPz*
SortUtil.swap(queue,j,k); e[!>ezaIY
k = j; eO G%6C%a
} RVnYe='
} o#6}?g.
private void fixUp(int k) { 6P|neb}
while (k > 1) { ]Jqe)o
int j = k >> 1; sAlgp2-
if (queue[j]>queue[k]) ztpb/9J9
break; k]g\` gc
SortUtil.swap(queue,j,k); {jG`l$$
k = j; ,cEcMaJ
} gK#w$s50
} 8ipLq`)
[NcOk,
} Pme?`YO$x
9Z 4R!Q
} :g";p.~=
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SortUtil： $)V4Eu;
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package org.rut.util.algorithm; zPYa@0I
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import org.rut.util.algorithm.support.BubbleSort; A?zW!'
import org.rut.util.algorithm.support.HeapSort; dz 2d`=`3
import org.rut.util.algorithm.support.ImprovedMergeSort; oMbCljUC
import org.rut.util.algorithm.support.ImprovedQuickSort; rg~CF<
import org.rut.util.algorithm.support.InsertSort; Xv:IbM> Qc
import org.rut.util.algorithm.support.MergeSort; wBET.l'd
import org.rut.util.algorithm.support.QuickSort; i|mA/ e3b
import org.rut.util.algorithm.support.SelectionSort; nj$K4_
import org.rut.util.algorithm.support.ShellSort; k_B^2=
H"l'E9k.&p
/** a{W-+t
* @author treeroot qT4s*kqr
* @since 2006-2-2 rge/jE,^~Z
* @version 1.0 %*nZ,r
*/ y]_DW6W
public class SortUtil { p'*UM%@SIY
public final static int INSERT = 1; 9iE66N>z
public final static int BUBBLE = 2; :83"t-O8[
public final static int SELECTION = 3; 7F4]EA^
public final static int SHELL = 4; E.9F~&DPJ<
public final static int QUICK = 5; 8^lXM-G-
public final static int IMPROVED_QUICK = 6; Xc^~|%+
public final static int MERGE = 7; 8h97~$7)
public final static int IMPROVED_MERGE = 8; Jk*MxlA.b
public final static int HEAP = 9; G w[&P%
U9w*x/Swb
public static void sort(int[] data) { Cn<x
sort(data, IMPROVED_QUICK); ?x97q3I+]
} K~]jXo^M
private static String[] name={ NL 37Y{b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `upNP/,
}; ks}o9[D3
51vK>
private static Sort[] impl=new Sort[]{ :y)'qv[
new InsertSort(), PR+!CFi&
new BubbleSort(), )-@EUN0E>5
new SelectionSort(), *)<tyIHd
new ShellSort(), 5z_)
new QuickSort(), +,lD_{}_
new ImprovedQuickSort(), LHb{9x
new MergeSort(), U VT8TN-T
new ImprovedMergeSort(), ! bp"pa9
new HeapSort() ~CA+'e%~~
}; gi)/iz`
sq_:U_tJ
public static String toString(int algorithm){ pP @#|T
return name[algorithm-1]; d\v _!7
} r!S iR(
5h1j.t!
public static void sort(int[] data, int algorithm) { w9%gaK;
impl[algorithm-1].sort(data); WxFjpJt
} 'SmdU1]4BD
5 Jhl4p}w
public static interface Sort { /Q!F/HY3ZS
public void sort(int[] data); N+\*:$>zt6
} abND#t
[H6>]&
public static void swap(int[] data, int i, int j) { S,H{\c
int temp = data; /2:r}O
data = data[j]; >BX_Bou
data[j] = temp; 1 wG1\9S
} llzl-2`/
} vl<J-+|0C