[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; dlZ2iDQ%
} dhP")@3K;p
int i1=l; nZYO}bv\
int i2=mid+1; aEa.g.SZ
for(int cur=l;cur<=r;cur++){ s4f{ziLp
if(i1==mid+1) h~%8p ]
data[cur]=temp[i2++]; vY4}vHH2
else if(i2>r) @[\zO'|
data[cur]=temp[i1++]; 0RSzDgX
else if(temp[i1] data[cur]=temp[i1++]; 3e-E/6zH6
else }3WP:Et
data[cur]=temp[i2++]; Ht}?=ZzW
} v`Y{.>[H[
} Vy/G-IASb
W4P\HM>2
} dqBN_P%
FD%OG6db];
改进后的归并排序: 'bH~KK5
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package org.rut.util.algorithm.support; TntTR"6aD
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import org.rut.util.algorithm.SortUtil; A^hafBa
XLYGhM
/** >ZgV8X:
* @author treeroot `l70i2xcj
* @since 2006-2-2 b ~]v'|5[
* @version 1.0 V4Qy^nn1
*/ "85)2*+
public class ImprovedMergeSort implements SortUtil.Sort { /={N^8^=x
u^'X>n)oL#
private static final int THRESHOLD = 10; +o,f:Ih
`{IL.9M!f
/* ' qT\I8%
* (non-Javadoc) >bmdu\j5R
* b,jo94.G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hd-g|'^K
*/ ^HuB40
public void sort(int[] data) { 4kV$JV.l
int[] temp=new int[data.length]; w4Hq|N1-Y
mergeSort(data,temp,0,data.length-1); C*RPSk
} e`JWY9%
BSr#;;\
private void mergeSort(int[] data, int[] temp, int l, int r) { c1R[Hck
int i, j, k; PN J&{4wY
int mid = (l + r) / 2; HHgv,bC!
if (l == r) 23houS
return; spQr1hx<
if ((mid - l) >= THRESHOLD) ^)`e}}
mergeSort(data, temp, l, mid); 2"}Vfy
else !lZ}kz0
insertSort(data, l, mid - l + 1); IY!8j$'|
if ((r - mid) > THRESHOLD) 5D7k[+6
mergeSort(data, temp, mid + 1, r); \?Xoa"^
else h^,L) E
insertSort(data, mid + 1, r - mid); b o_`P3
-I*vl
for (i = l; i <= mid; i++) { ApggTzh@
temp = data; Y>8JHoV
} eqOT@~H
for (j = 1; j <= r - mid; j++) { TB<$9FCHK
temp[r - j + 1] = data[j + mid]; {7$jwk
} |,H2ge
int a = temp[l]; @a=jSB#B
int b = temp[r]; qrZ3`@C4k
for (i = l, j = r, k = l; k <= r; k++) { ,5T1QWn^f
if (a < b) { Y}C|4"V
data[k] = temp[i++]; @S5HMJ2=
a = temp; *].qm g%
} else { m' |wlI[lq
data[k] = temp[j--]; >-3>Rjo>
b = temp[j]; -V"W
} |v#D}E
} !N][W#:
} +.rOqkxJ
k3Puq1H
/** @li/Y6Wh
* @param data R7h3O0@!
* @param l /74h+.amg
* @param i NP4u/C<
*/ f1U8 b*F<
private void insertSort(int[] data, int start, int len) { v7hw%9(=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m9DTz$S.
} '9Q#%E!*
} ])?h~
} MIiBNNURX
} *L Y6hph"
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堆排序： !4Sd^"
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package org.rut.util.algorithm.support; %z.d;[Hs
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import org.rut.util.algorithm.SortUtil; v:w^$]4
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/** t0/Ol'kgs
* @author treeroot *.D{d0A
* @since 2006-2-2 ,Qo:]Mj
* @version 1.0 {F\P3-ub
*/ WyM2h
public class HeapSort implements SortUtil.Sort{ _^ n>kLd$
A9J{>f
/* (non-Javadoc) |942#rM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ul 85-p
*/ ~RBa&Y=Mb
public void sort(int[] data) { OJM2t`}_t
MaxHeap h=new MaxHeap(); b=Ektq
h.init(data); \CS4aIp
for(int i=0;i h.remove(); ~,8#\]xR
System.arraycopy(h.queue,1,data,0,data.length); X%B$*y5
} E7w^A
![]6| G&
private static class MaxHeap{ C}L2'l,
& \"cV0
void init(int[] data){ WYcZD_
this.queue=new int[data.length+1]; (hKjr1s
for(int i=0;i queue[++size]=data; jzWgyI1b
fixUp(size); #~qzaETv,
} F/:%YR;
} ~xws5n}F
:DuEv:;v
private int size=0; 6O0aGJ,H
$j@P8<M7
private int[] queue; uI9+@oV
o>&pj
public int get() { z fy(j
return queue[1]; 9d=\BBNZ
} G_ ~qk/7mF
~u[1Vz4#3
public void remove() { j|p=JrCJ
SortUtil.swap(queue,1,size--); f%[xl6VE;
fixDown(1); n 1^h;2gz
} Ruwp"T}mF
file://fixdown zh(=kS`
private void fixDown(int k) { '9&@?P;
int j; <'hoN/g
while ((j = k << 1) <= size) { P^lzbWj^
if (j < size %26amp;%26amp; queue[j] j++; Li 9$N"2
if (queue[k]>queue[j]) file://不用交换 zQu9LN
break; #%#N.tB5
SortUtil.swap(queue,j,k); I\[z(CHg@
k = j; ?UeV5<TewS
} i`iR7UmHeR
} j*GS')Cm
private void fixUp(int k) { |}X[Yg=FG
while (k > 1) { ;.R) uCd{=
int j = k >> 1; ?T|0"|\"'
if (queue[j]>queue[k]) 9gIim
break; /{I-gjovy
SortUtil.swap(queue,j,k); + kF%>F]
k = j; XV)ctF4
} K,*z8@
} 45jImCm
:n%&
} $_\x}`c~.
\E05qk_;K
} tk:G6Bkid
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SortUtil： qamq9F$V
M}=>~TA@
package org.rut.util.algorithm; Y\4B2:Qd9
)N\BC
import org.rut.util.algorithm.support.BubbleSort; /paZJ}Pr.
import org.rut.util.algorithm.support.HeapSort; )%8st'
import org.rut.util.algorithm.support.ImprovedMergeSort; .O&YdUo
import org.rut.util.algorithm.support.ImprovedQuickSort; uy<b5.!-
import org.rut.util.algorithm.support.InsertSort; G2P:|R
import org.rut.util.algorithm.support.MergeSort; +u&3pK>f
import org.rut.util.algorithm.support.QuickSort; t/3qD7L
import org.rut.util.algorithm.support.SelectionSort; 0&tr3!h\
import org.rut.util.algorithm.support.ShellSort; yDRi
^B7Ls{
/** =OTu8_ d0t
* @author treeroot MvaX>n!o
* @since 2006-2-2 {* w _*
* @version 1.0 ETdN<}m
*/ :$P1ps3B
public class SortUtil { d%E*P4Ua
public final static int INSERT = 1; GR 1%(,
public final static int BUBBLE = 2; Q`-Xx
public final static int SELECTION = 3; :C={Z}t/F
public final static int SHELL = 4; B9c gVTLj
public final static int QUICK = 5; ~JS@$#
public final static int IMPROVED_QUICK = 6; /o}i,i$
public final static int MERGE = 7; HTm`_}G9
public final static int IMPROVED_MERGE = 8; >8$Lqj^i
public final static int HEAP = 9; ::cI4D
L{&Yh|}
public static void sort(int[] data) { )YwLj&e4tf
sort(data, IMPROVED_QUICK); oP:R1<
} QDb8W*&<
private static String[] name={ ?_T[]I'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g+?2@L$L
}; \,lIPA/L
7fl{<uf
private static Sort[] impl=new Sort[]{ s={IKU&m[
new InsertSort(), e:T9f('
new BubbleSort(), GSfU*@L3
new SelectionSort(), >CHb;*U
new ShellSort(), T?tZ?!6
new QuickSort(), jTW8mWNk]
new ImprovedQuickSort(), _({wJ$aYC
new MergeSort(), # 00?]6`z
new ImprovedMergeSort(), {V8uk$
new HeapSort() i#*lK7
}; 7[0CVWs,
4jjo%N
public static String toString(int algorithm){ }I18|=TB
return name[algorithm-1]; J(P'!#z^
} DH4IF i>
PM&NY8|Zy
public static void sort(int[] data, int algorithm) { ^_W] @m2
impl[algorithm-1].sort(data); j^h:*rw
} J'k^(ZZ
8VC%4+.FF
public static interface Sort { tOo\s&j
public void sort(int[] data); S?c<Lf~W
} f=7[GZoDn
,8!'jE[d
public static void swap(int[] data, int i, int j) { = U[$i"+
int temp = data; H%i [;
data = data[j]; u Qg$hS
data[j] = temp; ;w._/
} b8Hzl!zO
} C+dz0u3s