[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; a9Zq{Ysj
} FfT`;j
int i1=l; ]Zh%DQ
int i2=mid+1; SOA,kwHRe
for(int cur=l;cur<=r;cur++){ 5\VWCI
if(i1==mid+1) c@L< Z`u
data[cur]=temp[i2++]; ~((O8@}J
else if(i2>r) {]4LULq
data[cur]=temp[i1++]; sK?twg;D*|
else if(temp[i1] data[cur]=temp[i1++]; HJ.-Dg5U
else KHvYUTY
data[cur]=temp[i2++]; 5]:U9ts#
} j^RmrOg,
} JNnDts*w
dioGAai'
} (KZ{^X?a
gw<q.XL
改进后的归并排序: $VOFOc
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package org.rut.util.algorithm.support; 5wU]!bxr
8P\Zo8}v
import org.rut.util.algorithm.SortUtil; `C'H.g\>2Q
j8:\%|
/** QS;f\'1bb
* @author treeroot +]{G@pn
* @since 2006-2-2 &s>Jb?_5Mx
* @version 1.0 S)"Jf?
*/ b^vQpiz
public class ImprovedMergeSort implements SortUtil.Sort { )Hr`MB
YKK*ER0
private static final int THRESHOLD = 10; XC#oB~K'
aV0"~5
/* ]\HvKCN}
* (non-Javadoc) /&JT~M
* "qy,*{~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +k R4E23:
*/ qwAT>4
public void sort(int[] data) { 9QJyZ
int[] temp=new int[data.length]; 4Ftu
mergeSort(data,temp,0,data.length-1); N!tX<u~2
} R[+<^s}p/
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private void mergeSort(int[] data, int[] temp, int l, int r) { k$:|-_(w
int i, j, k; t4-[Z$n5
int mid = (l + r) / 2; )NT*bLRPQ
if (l == r) (A.C]hD
return; h'nY3GrU
if ((mid - l) >= THRESHOLD) EU Fa5C:
mergeSort(data, temp, l, mid); 6j|{`Zd)G
else j3ls3H&
insertSort(data, l, mid - l + 1); 0jWVp-y
if ((r - mid) > THRESHOLD) 4E}Yt$|
mergeSort(data, temp, mid + 1, r); as=fCuJ
else "_?nN"A7
insertSort(data, mid + 1, r - mid); pEz_qy[#
_+3::j~;m
for (i = l; i <= mid; i++) { 0JujesUw(
temp = data; Zx>=tx}
} "Z+k=~(
for (j = 1; j <= r - mid; j++) { S$-7SEkO+
temp[r - j + 1] = data[j + mid]; j<e2d7oN
} 8zq=N#x
int a = temp[l]; [{/jI\?v
int b = temp[r]; #,'kXj
for (i = l, j = r, k = l; k <= r; k++) { )D%~`,#pQ
if (a < b) { @IZnFHN
data[k] = temp[i++]; u9p$YJ
a = temp; j![\& z
} else { ql~J8G9
data[k] = temp[j--]; u_Z+;{]Pj
b = temp[j]; e&>2 n
} F_P~x(X
} 3o/[t
} :[d9tm
/G`]=@~
/** ZWm6eD
* @param data xN'I/@ kb
* @param l a?oI>8*
* @param i &uVnZ@o42
*/ ;qV>L=a
private void insertSort(int[] data, int start, int len) { iK;XZZ(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w&.aQGR#
} Gav$HLx
} h;'~,xA
} 0b 54fD=
} x.4m|f0;
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堆排序： 3PF_H$`oJ
V|R,!UND
package org.rut.util.algorithm.support; \z)%$#I
B`sAk %
import org.rut.util.algorithm.SortUtil; ?gXp*>Kg[
MnHNjsO#
/** ue>D7\8
* @author treeroot /g.U&oI]D
* @since 2006-2-2 .fs3>@T"#
* @version 1.0 7uk[Oy<_
*/ UC$ppTCc?
public class HeapSort implements SortUtil.Sort{ "ocyK}l.?
zKK9r~ M
/* (non-Javadoc) b~cZS[S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l%=;
*/ MpOc
public void sort(int[] data) { V]?R>qhgu
MaxHeap h=new MaxHeap(); l}P=/#</T
h.init(data); |1Z)E+q*:
for(int i=0;i h.remove(); 3__-nV
System.arraycopy(h.queue,1,data,0,data.length); /zox$p$?h
} EiaW1Cs
wdoR%b{M
private static class MaxHeap{ ,/U6[P_C5
dD@(z:5M\
void init(int[] data){ J9 I:Q<;
this.queue=new int[data.length+1]; _(zG?]y0P
for(int i=0;i queue[++size]=data; GKeU%x
fixUp(size); 4 H&#q>
} DW3G
} og>uj>H&
4I(Xy]wm
private int size=0; CNx8] _2
BL4-7
private int[] queue; -7|H}!DFT
|V7*l1
public int get() { 4b`=>X;W
return queue[1]; .eC1qWZJpd
} UL9n-M=
,]/X\t5]D
public void remove() { TJ*T:?>e
SortUtil.swap(queue,1,size--); ;9'OOz|+1
fixDown(1); . 'yCw#f
} $`'/+x"%
file://fixdown ^/k*h J{
private void fixDown(int k) { :2)/FPL6
int j; d0 /#nz
while ((j = k << 1) <= size) { Z #m+ObHK1
if (j < size %26amp;%26amp; queue[j] j++; .o}v#W+st
if (queue[k]>queue[j]) file://不用交换 G]aOHJ:.
break; kvj#c
SortUtil.swap(queue,j,k); U`s{Jm
k = j; 3=;<$+I6
} R/a*LSe@&
} (4-CF3D
private void fixUp(int k) { tZB<on<.)
while (k > 1) { (uidNq
int j = k >> 1; )=-szJjXZ
if (queue[j]>queue[k]) BD7Ni^qI$
break; S`]k>' l
SortUtil.swap(queue,j,k); a-J.B.A$Z/
k = j; Yz93'HDB
} ?Ss!e$jf
} h@wgd~X9
Z5]>pJFq,
} r,2g^K)6
rQ snhv
} BfiD9ka-z
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SortUtil： YZJyk:H\
9-m=*|p
package org.rut.util.algorithm; GsM<2@?
0C,`h`
import org.rut.util.algorithm.support.BubbleSort; ,MIV=*
import org.rut.util.algorithm.support.HeapSort; 7Fsay+a
import org.rut.util.algorithm.support.ImprovedMergeSort; @9|hMo
import org.rut.util.algorithm.support.ImprovedQuickSort; PeEj&4k
import org.rut.util.algorithm.support.InsertSort; U,1-A=Og{o
import org.rut.util.algorithm.support.MergeSort; ={Qi0Pvt
import org.rut.util.algorithm.support.QuickSort; | VDV<g5h
import org.rut.util.algorithm.support.SelectionSort; IO:G1;[/2L
import org.rut.util.algorithm.support.ShellSort; FML(4BY,
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/** (&x['IR
* @author treeroot bi;1s'Y<D
* @since 2006-2-2 g< .qUBPKX
* @version 1.0 13/]DF,S"^
*/ Ny)X+2Ae
public class SortUtil { C+&l< fM&
public final static int INSERT = 1; Eu04e N
public final static int BUBBLE = 2; seeBS/%
public final static int SELECTION = 3; ZqO^f*F>h
public final static int SHELL = 4; 18:%~>.!
public final static int QUICK = 5; 0+b1vhQ
public final static int IMPROVED_QUICK = 6; FHI ;)wn=
public final static int MERGE = 7; ,5<Cd,`*
public final static int IMPROVED_MERGE = 8; .(2ik5A%9
public final static int HEAP = 9; 3"\lu?-E
Pj%|\kbNs
public static void sort(int[] data) { %D "I
sort(data, IMPROVED_QUICK); 'H<\x
} Pg7Yp2)Oli
private static String[] name={ x]ot 2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &b& ,
}; E8&TO~"a]e
y4fdq7i~}9
private static Sort[] impl=new Sort[]{ 9=2$8JN=(l
new InsertSort(), 0_t!T'jr7
new BubbleSort(), b>JDH1)
new SelectionSort(), qJUK_6|3
new ShellSort(), y:l\$pGC%
new QuickSort(), {.mngRQF
new ImprovedQuickSort(), $L]lHji
new MergeSort(), ~61v5@
new ImprovedMergeSort(), ~W]TD@w
new HeapSort() +=8VTCn?
}; FaJ&GOM,
M\Kx'N
public static String toString(int algorithm){ z2>lI9D4V
return name[algorithm-1]; `*KHSA
} jRV/A!4
v|2T%y_ u
public static void sort(int[] data, int algorithm) { N ZSSg2TX#
impl[algorithm-1].sort(data); =w0R$&b&
} :*\Pn!r
bA->{OPkT
public static interface Sort { 45>?o
public void sort(int[] data); Yg1X
} !g2+w$YVa
sD wqH.L
public static void swap(int[] data, int i, int j) { lHX72s|V
int temp = data; 8}UIbF
data = data[j]; b|W=pSTY
data[j] = temp; f& '
} N]sAji*
} ?FcAXA/J{