[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; f(Y_<%
} /a'1W/^2
int i1=l; N0H=;CIQ
int i2=mid+1; s3HVX'
for(int cur=l;cur<=r;cur++){ #l ZK_N|1x
if(i1==mid+1) N+'j on}U
data[cur]=temp[i2++]; _Ao$)Gu)
else if(i2>r) "$XX4w M
data[cur]=temp[i1++]; sxsb)a
else if(temp[i1] data[cur]=temp[i1++]; zw['hqW
else f. "\~
data[cur]=temp[i2++]; xNzGp5H
} Nai5!_'
} ?u|@,tQ[
4qE95THB
} <q8@a0e@
=}vT>b
改进后的归并排序: "|h%Uy?XY
- 8p!,+Dk
package org.rut.util.algorithm.support; <%HRs>4
TG%B:^Yz!
import org.rut.util.algorithm.SortUtil; ;%9]G|*{
T1]?E]m{
/** 7Ml4u%?
* @author treeroot h:nybLw?
* @since 2006-2-2 fC[za,PXaE
* @version 1.0 EHk\Q\
*/ Gq^vto
public class ImprovedMergeSort implements SortUtil.Sort { DsejZ&
lj (y
private static final int THRESHOLD = 10; Ut;`6t
HwFX,?
/* cg.{oMwa
* (non-Javadoc) ` y\)X C7
* hW~.F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8.i4QaU
*/ 83n%pS4x
public void sort(int[] data) { eXW|{asx
int[] temp=new int[data.length]; $@>0;i::
mergeSort(data,temp,0,data.length-1); u.ggN=Z
} BDTL5N
X H-_tvB
private void mergeSort(int[] data, int[] temp, int l, int r) { Qc; kj
int i, j, k; x@t?7 o\&
int mid = (l + r) / 2; z3Q&O$5\
if (l == r) 2yZr!Rb~*
return; "f,{d}u
if ((mid - l) >= THRESHOLD) "2l`XH
mergeSort(data, temp, l, mid); m1l6QcT1
else U[@y8yN6M
insertSort(data, l, mid - l + 1); CIjc5^Y2
if ((r - mid) > THRESHOLD) {~3QBMx6
mergeSort(data, temp, mid + 1, r); `7CK;NeT
else [d: u(
insertSort(data, mid + 1, r - mid); 0B}4$STOo[
H$KO[mW}
for (i = l; i <= mid; i++) { ~SnUnNDm`
temp = data; j*jUcD*
} *.DC(2:o!
for (j = 1; j <= r - mid; j++) { *yu}e)(0
temp[r - j + 1] = data[j + mid]; 4J2^zx,H
} |A%9c.DG.
int a = temp[l]; lN,?N{6s
int b = temp[r]; aQCu3T
for (i = l, j = r, k = l; k <= r; k++) { ieFl4hh[G
if (a < b) { o4);5~1l
data[k] = temp[i++]; 1~5DIU^
a = temp; qN $t_
} else { 0cd_l 2f#g
data[k] = temp[j--]; c$O8Rhx
b = temp[j]; ,o&C"sb
} S#7YJ7 K"N
} MUO<o
} \$ytmtf5
<$A,Ex94
/** Y%pab/Y
* @param data -8Jw_
* @param l CM;b_E)9)f
* @param i =p+y$
*/ !%iHJwS#
private void insertSort(int[] data, int start, int len) { E TT46%Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jJy:/!i
} EB~]6.1
} ?sf<cFF
} !@xO]Jwv
} Vy\Vpp
-V2\s
堆排序： N3%X>*'
2 !s&|lI
package org.rut.util.algorithm.support; %rzPh<>e
"Ms;sdjg}&
import org.rut.util.algorithm.SortUtil; W>K^55'
6':iW~iI
/** *'%V}R[>
* @author treeroot &Y]':gJ
* @since 2006-2-2 +yGQt3U
* @version 1.0 ,T$ts
*/ . %RM8
public class HeapSort implements SortUtil.Sort{ b)LT[>f
L:z0cvn"
/* (non-Javadoc) ag-A}k>v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X8nos
*/ G]^[i6PQs
public void sort(int[] data) { w!.@64-
MaxHeap h=new MaxHeap(); yvAO"43
h.init(data); [q<'ty
for(int i=0;i h.remove(); kv+%
System.arraycopy(h.queue,1,data,0,data.length); 2w 2Bc+#o
} d#k(>+%=Q
2jsbg{QS#_
private static class MaxHeap{ d2rs+-
dbI>\khI
void init(int[] data){ .tngN<f
this.queue=new int[data.length+1]; ,YYEn^:>
for(int i=0;i queue[++size]=data; w5@5"M
fixUp(size); .iXN~*+g
} $l7^-SK`E
} 64s;EC
AK:cDKBO
private int size=0; o[|[xuTm
8bIP"!=*W
private int[] queue; i5,iJe0cA
).T&fa"
public int get() { -%nD'qy,.
return queue[1]; 18X@0e
} Y G+|r
Q;M\fBQO}&
public void remove() { ?,} u6tH
SortUtil.swap(queue,1,size--); $3-vW{<
fixDown(1); ^h(wi`i
} zLI0RI.Pe
file://fixdown }z3j7I
private void fixDown(int k) { $|K d<wv
int j; )vp0X\3q`
while ((j = k << 1) <= size) { O%bbyR2
if (j < size %26amp;%26amp; queue[j] j++; 9t`;~)o
if (queue[k]>queue[j]) file://不用交换 dG\wW@}J
break; 8{ zX=
SortUtil.swap(queue,j,k); baxZ>KNi
k = j; F:{*4b
} |P|B"I<?
} ?J}Q&p.
private void fixUp(int k) { >lI7]hbIs
while (k > 1) { *Gsj pNr-
int j = k >> 1; Y\|#Lu>B
if (queue[j]>queue[k]) Zk3Pv0c
break; .3!Wr*o
SortUtil.swap(queue,j,k); ]WT@&F
k = j; la!]Y-s)'4
} SZykG[
} JA^o/%a^
\Mf>X\}
} .@1+}0
c-LzluWi
} >{#JIG.
;>6< u.N
SortUtil： x4_IUIgh
q"2QNF'
package org.rut.util.algorithm; o)`PSw=
eP{srP3 9
import org.rut.util.algorithm.support.BubbleSort; QX,$JM3
import org.rut.util.algorithm.support.HeapSort; @gUp9ZwtH
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Zx5+rM${}
import org.rut.util.algorithm.support.ImprovedQuickSort; t],a1I.gk
import org.rut.util.algorithm.support.InsertSort; P_bB{~$4
import org.rut.util.algorithm.support.MergeSort; AtT7~cVe
import org.rut.util.algorithm.support.QuickSort; 86&M Zdv6
import org.rut.util.algorithm.support.SelectionSort; ~.a"jYb7A}
import org.rut.util.algorithm.support.ShellSort; Zxk~X}K\P
&@=Jm /5
/** 0<M-asI?
* @author treeroot qwTz7r
* @since 2006-2-2 cNll??j
* @version 1.0 .i0K-B
*/ ' jciX]g
public class SortUtil { =SDex.ZK]
public final static int INSERT = 1; #2Rz=QI
public final static int BUBBLE = 2; woI5aee|
public final static int SELECTION = 3; "N4^ ^~s
public final static int SHELL = 4; P^Hgm
public final static int QUICK = 5; {v={q1
public final static int IMPROVED_QUICK = 6; ,@$5,rNf
public final static int MERGE = 7; `sjY#Ua<
public final static int IMPROVED_MERGE = 8; w,|@e_|J
public final static int HEAP = 9; t}t(fJHY`
"2%z;!U1
public static void sort(int[] data) { ?0qVyK_1
sort(data, IMPROVED_QUICK); s 6Wp"V(
} BR|!ya+_2
private static String[] name={ Bfb~<rs[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ct+F\:e
}; q~{) {t;
c r=Q39{
private static Sort[] impl=new Sort[]{ gC7!cn
new InsertSort(), `Fqth^RK?p
new BubbleSort(), RB>=#03
new SelectionSort(), K)SWM3r
new ShellSort(), #*A'<Zm
new QuickSort(), 3@Ndn
new ImprovedQuickSort(), >t+ ENYb
new MergeSort(), <^S\&v1C_
new ImprovedMergeSort(), Bc>j5^)8w
new HeapSort() m\teE]8x
}; 4[ uqsJB
e=]SIR()`
public static String toString(int algorithm){ |mT%IR
return name[algorithm-1]; =4TQ*;V:
} $v>q'8d
A;cA|`b
public static void sort(int[] data, int algorithm) { _|~Dj)z
impl[algorithm-1].sort(data); =<\22d5L
} R~<N*En~
:>-zT[Lcn
public static interface Sort { XQ1]F{?/H
public void sort(int[] data); 18$d-[hX
} H3wJ5-q(
\p^V~fy7rU
public static void swap(int[] data, int i, int j) { G1|1Z5r
int temp = data; i0M6;W1T
data = data[j]; u%-]-:c
data[j] = temp; pl8b&bLzi
} ~cU1 /CW8
} (Cr