[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; '>"blfix8
} zqt%x?l
int i1=l; 3H<%\SYp
int i2=mid+1; myVa5m!7Q
for(int cur=l;cur<=r;cur++){ Yx,E5}-
if(i1==mid+1) FS)# v
data[cur]=temp[i2++]; t@R n#(~"
else if(i2>r) \7h>9}wGf
data[cur]=temp[i1++]; A#K<5%U{Mv
else if(temp[i1] data[cur]=temp[i1++]; J9t?;3
else 1D)0\#><
data[cur]=temp[i2++]; hMz)l\0
} &2.DZ),L
} y4@gw.pt
IP{$lC
} >h:'Z*9
<7)sS<I
改进后的归并排序: H}_R`S
[%yj' )R/
package org.rut.util.algorithm.support; teb(gUy}L6
V=fh;p
import org.rut.util.algorithm.SortUtil; AB3OG*C9
8kcMgCO
/** yaG:}=.3
* @author treeroot ,?jc0L.'r]
* @since 2006-2-2 "~.4z,ha
* @version 1.0 %t6-wWM97
*/ _UZPQ[
public class ImprovedMergeSort implements SortUtil.Sort { )2l @%?9
w2s06`g
private static final int THRESHOLD = 10; G0Z5h
R|$b\3
/* Vh;|qF 9
* (non-Javadoc) qAd=i0{N
* 6&;GC<].(y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KX;JX*)J
*/ J,?F+Qji&=
public void sort(int[] data) { U8NX%*oW
int[] temp=new int[data.length]; )HI\T];
mergeSort(data,temp,0,data.length-1); m3o -p
} ;!VxmZ:j[
K/Pw;{}
private void mergeSort(int[] data, int[] temp, int l, int r) { \6MM7x(U3
int i, j, k; 4sORp^t'Q
int mid = (l + r) / 2; rp"5176
if (l == r) Id`V`|q
return; Nr]Fh
if ((mid - l) >= THRESHOLD) Sx J0Y8#z
mergeSort(data, temp, l, mid); HnjA78%i
else djnES,^%9
insertSort(data, l, mid - l + 1); MCEHv}W
if ((r - mid) > THRESHOLD) __7}4mA
mergeSort(data, temp, mid + 1, r); .hG*mXw>
else )qMbk7:v\
insertSort(data, mid + 1, r - mid); opm_|0
jDQ?b\^
for (i = l; i <= mid; i++) { k{vbi-^6rf
temp = data; AWMJ/E*T
} n6t@ e^
for (j = 1; j <= r - mid; j++) { ?ZGsh7<k
temp[r - j + 1] = data[j + mid]; `V<jt5TS
} gd7r9yV
int a = temp[l]; _#r00Ze
int b = temp[r]; O9>$(`@I
for (i = l, j = r, k = l; k <= r; k++) { f@hM^%
if (a < b) { c'3N;sZ*B
data[k] = temp[i++]; 45wtl/^9
a = temp; +a N8l1
} else { q1eMK'1
data[k] = temp[j--]; h/|p`MP\1
b = temp[j]; Pf,@U'f|
} d8agM/F*/
} 6|B9kh}
} 1,) yEeHjU
8TAJ#Lm
/** <B0f
* @param data 6hd<ys?
* @param l 3+uL@LXd
* @param i *-Yw%uR
*/ o<3$|`S&
private void insertSort(int[] data, int start, int len) { $Z;/Sh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MIr+4L
} ~AYleM
} _h#I}uJ~
} ej}S{/<*n
} P33xt~
9NU0K2S
堆排序： hchG\i
m#8[")a$"
package org.rut.util.algorithm.support; vaP`'
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import org.rut.util.algorithm.SortUtil; /; Bmh=
n6WKk+
/** <nqv)g"u0
* @author treeroot 1F5KDWtE
* @since 2006-2-2 :zKMw=
* @version 1.0 G'G8`1Nj
*/ /<8y>
public class HeapSort implements SortUtil.Sort{ xR3$sA2
Ws`ndR
/* (non-Javadoc) /qIl)+M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rq8 d}wj
*/ lcm[l
public void sort(int[] data) { fM"*;LN!N
MaxHeap h=new MaxHeap(); ]"{8"+x
h.init(data); 3rKJ<(-2/
for(int i=0;i h.remove(); ]'(D*4
System.arraycopy(h.queue,1,data,0,data.length); n:`f.jG |
} [C0v-
7LVG0A2>7
private static class MaxHeap{ \z0HHCn'"
9K`_P] l2z
void init(int[] data){ 0Z6geBMc
this.queue=new int[data.length+1]; I@9'd$YY
for(int i=0;i queue[++size]=data; Is7BJf
fixUp(size); R'tKJ_VI
} rniM[7K
} 2NMs-Zs
%k1Pyv;]
private int size=0; u>"0>U
K$M+"#./
private int[] queue; mvZ#FF1,J
s<FBr,
public int get() { *|dr-e_j
return queue[1]; }Rw,4
} kzRJzJquP
pzz*>Y
public void remove() { 87 s*lS
SortUtil.swap(queue,1,size--); gk%@& TB/
fixDown(1); rYr*D[m]
} |M?vFF]TN
file://fixdown kUgfFa#_
private void fixDown(int k) { V3t#kv
int j; @GFB{ ;=
while ((j = k << 1) <= size) { Y"MHs0O5>
if (j < size %26amp;%26amp; queue[j] j++; LjBIRV7
if (queue[k]>queue[j]) file://不用交换 be,Rj,-
break; 3J+2#ML
SortUtil.swap(queue,j,k); @;bBc
k = j; U;MXiE3D
} erUYR"
} |R0f--;
private void fixUp(int k) { lQ;BI~
while (k > 1) { z~ C8JY:
int j = k >> 1; VX$WL"A
if (queue[j]>queue[k]) u##th8h4U
break; k9;^|Cm k
SortUtil.swap(queue,j,k); c;$4}U4
k = j; h<Aq|*
} ai/|qYf
} _?I{>:!|
1g{Pe`G,
} C}RO'_Pq
3x0t[{l
} IFp%Ta
h= sNj
SortUtil： 5 aA* ~\
hGz_F/
package org.rut.util.algorithm; Kp`{-dUf
\EySKQ=
import org.rut.util.algorithm.support.BubbleSort; C1k< P
import org.rut.util.algorithm.support.HeapSort; =:^aBN#
import org.rut.util.algorithm.support.ImprovedMergeSort; ?q:|vt
import org.rut.util.algorithm.support.ImprovedQuickSort; 3=YpZ\l}
import org.rut.util.algorithm.support.InsertSort; }~/b%^
import org.rut.util.algorithm.support.MergeSort; %tyo(HZQ
import org.rut.util.algorithm.support.QuickSort; 4#B'pJMw9
import org.rut.util.algorithm.support.SelectionSort; Y &Cb
import org.rut.util.algorithm.support.ShellSort; i41~-?Bc
R c+olJ^5
/** %y6(+I#P
* @author treeroot Qq<@;4
* @since 2006-2-2 gc.Lh~
* @version 1.0 #J"xByQKK
*/ c1yRy|
public class SortUtil { I,{YxY[$7
public final static int INSERT = 1; SO$Af!S:bB
public final static int BUBBLE = 2; o.{W_k/n
public final static int SELECTION = 3; D:1@1Jr
public final static int SHELL = 4; =&bI-
public final static int QUICK = 5; & o5x
public final static int IMPROVED_QUICK = 6; hx:q@[ +J/
public final static int MERGE = 7; Re,;$_6o
public final static int IMPROVED_MERGE = 8; /;*_[g5*i
public final static int HEAP = 9; /4&gA5BS]
1!<t8,W4
public static void sort(int[] data) { @8|*Ndx2
sort(data, IMPROVED_QUICK); s?w2^<P
} <\^0!v
private static String[] name={ QqA=QTZ}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v'W{+>.
}; yQK{ +w
tVAi0`DV
private static Sort[] impl=new Sort[]{ heVkCM :
new InsertSort(), 'ToE Y3
new BubbleSort(), y[8;mCh
new SelectionSort(), D'g,<-ahl
new ShellSort(), NKu[6J?)
new QuickSort(), )}ev;37<C
new ImprovedQuickSort(), >'*%wf[{
new MergeSort(), 6 c_#"4
new ImprovedMergeSort(), -s3`mc}*
new HeapSort() qoO`)<
}; 'C1lP)S5
ytZo0pad
public static String toString(int algorithm){ kxMvOB$
return name[algorithm-1]; paqGW]
} *N">93:
=;rLv7(a
public static void sort(int[] data, int algorithm) { YM}a>o
impl[algorithm-1].sort(data); F]aoTy
} h?mDtMCw2
S,m(
public static interface Sort { 5\+*ml
public void sort(int[] data); +A| Bc~2!
} Q|'f3\
>,e^}K}C
public static void swap(int[] data, int i, int j) { }[AaI #
int temp = data; u<-)C)z
data = data[j]; n{tc{LII/
data[j] = temp; 0#*6:{/^
} OQ-) 4Uk}
} 8q^}AT<C