[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; h_>DcVNIx
} uh<e-;vU
int i1=l; [d?tf
int i2=mid+1; JGHQzC
for(int cur=l;cur<=r;cur++){ Ndz'^c
if(i1==mid+1) u7/]Go44
data[cur]=temp[i2++]; :pH3M[7
else if(i2>r) ]t"X~
data[cur]=temp[i1++]; 1IPRI<1U
else if(temp[i1] data[cur]=temp[i1++]; '< .gKo
else >vPv4e7&3
data[cur]=temp[i2++]; cM_!_8o
} x DiGN Jc
} \=qZ),bU@
1c\KRK4
} C0gY
e"(SlR
改进后的归并排序: c5em*qCw$
|Vo{ {)
package org.rut.util.algorithm.support; |!q,J
]r\FC\n6e
import org.rut.util.algorithm.SortUtil; :Tcvj5
e>T;'7HSS"
/** po!bRk[4
* @author treeroot i5 0c N<o
* @since 2006-2-2 *S<d`mp[
* @version 1.0 ZLZh$eZZ
*/ |)65y
public class ImprovedMergeSort implements SortUtil.Sort { *x-@}WY$U
/O}lSXo6E
private static final int THRESHOLD = 10; : i{tqY%
iLt2L;v>h
/* j Gp&P
* (non-Javadoc) 3GL,=q
* 3y%,f|ju
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LC,6hpmh
*/ Al1}Ir
public void sort(int[] data) { 3}}8ukq
int[] temp=new int[data.length]; 2Krh&
mergeSort(data,temp,0,data.length-1); SE$~Wbj?
} eg1Mdg\a
^o87qr0g]
private void mergeSort(int[] data, int[] temp, int l, int r) { 8#nAs\^
int i, j, k; #62*'.B4
int mid = (l + r) / 2; I {%Y0S
if (l == r) R > [2*o"
return; VkkC;/BBW
if ((mid - l) >= THRESHOLD) Jsa]RA
mergeSort(data, temp, l, mid); ,4j^lgJ
else E?0Vo%Vh
insertSort(data, l, mid - l + 1); O2:1aG
if ((r - mid) > THRESHOLD) %i) 0sET
mergeSort(data, temp, mid + 1, r); BJgHel+N
else d=0{vsrB
insertSort(data, mid + 1, r - mid); 8'ut[
jf.WmiDC
for (i = l; i <= mid; i++) { $|tk?Sps
temp = data; rI OKCL?
} TbD $lx3>
for (j = 1; j <= r - mid; j++) { . {vMn0c
temp[r - j + 1] = data[j + mid]; A*~BkvPr
} j+PLtE
int a = temp[l]; PA*1]i#2M=
int b = temp[r]; T/PmT:Qg`
for (i = l, j = r, k = l; k <= r; k++) { t*J?#r
if (a < b) { !>#gm7
data[k] = temp[i++]; P(UY}oU
a = temp; +G6 Ge;
} else { 0a2#36;_IK
data[k] = temp[j--]; j 8)*'T
b = temp[j]; dZY|6
} rJ{k1H>
} Z,DSTP\|
} 8!{ }WLwb
+Ks3
/** "rrw~
* @param data vm7ag 7@O
* @param l Rk-G|52g
* @param i zE Ly1v\"
*/ EbeSl+iMx_
private void insertSort(int[] data, int start, int len) { -,Js2+QZ#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~z(0XKq0d
} nsM.`s@V
} %d%FI"!K
} P]iJ"d]+X
} !"ir}Y%
|l-O e
堆排序： RBfzti6
-Q/wW4dE=
package org.rut.util.algorithm.support; wRZFBf~ :
Y4+]5;B8
import org.rut.util.algorithm.SortUtil; W!"Oho'
<J>k%,:B
/** d)3jkHYEjj
* @author treeroot !ALq?u
* @since 2006-2-2 C[';B)a
* @version 1.0 ,vo]WIQ\:
*/ bk1.H@8
public class HeapSort implements SortUtil.Sort{ yFn~rv|&G
ILx4[m7
/* (non-Javadoc) )%b 5uZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K^h9\<w
*/ [&IcIZ
public void sort(int[] data) { (+6N)9rj`/
MaxHeap h=new MaxHeap(); #Cx#U"~G`
h.init(data); Z^BZH/I?
for(int i=0;i h.remove(); PC\p>6xT
System.arraycopy(h.queue,1,data,0,data.length); ?-~<Vc*
} }(!rB#bf
3kT?Y7<fv
private static class MaxHeap{ PI@?I&Bo
A<^X P-Nrp
void init(int[] data){ (! 8y~n1
this.queue=new int[data.length+1]; cE>m/^SKr
for(int i=0;i queue[++size]=data; d+vAm3.Dg
fixUp(size); xSm~V3bc
} s)?GscPG!
} /6F\]JwU
7[mP@ {
private int size=0; /bn$@Cy@
^G 'n z
private int[] queue; *8+HQ[[#
"bB0$>0,
public int get() { %QQ 2u$
return queue[1]; As5-@l`@
} 89j:YfA=v
Q3Z?Z;2aR
public void remove() { N]14~r=
SortUtil.swap(queue,1,size--); ,c0t#KgQ.
fixDown(1); E3(o}O
} Vc6 >i|"-O
file://fixdown +*Fe
private void fixDown(int k) { D>^g2!b:
int j; lD->1=z
while ((j = k << 1) <= size) { H!6+x*P0
if (j < size %26amp;%26amp; queue[j] j++; (sI`FW_
if (queue[k]>queue[j]) file://不用交换 hT,rcIkg:
break; '? -N
SortUtil.swap(queue,j,k); 5wdKu,nq
k = j; `A5n6*A7
} CbXSJDs
} M6 8foeeN
private void fixUp(int k) { 7<=p*
while (k > 1) { `Kn+d~S4
int j = k >> 1; 86 9sS
if (queue[j]>queue[k]) 7KGb2V<t
break; ]jPP]Z:y
SortUtil.swap(queue,j,k); q!+:zZu
k = j; ]NtBP
} 'r(g5H1}gi
} ..k8HFz>"
Kv:Rvo
} +sTPTCLE
=y(*?TZH
} yye5GVY$
p] N/]2rR
SortUtil： @h_ bXo
`>b,'u6F
package org.rut.util.algorithm; 0rQr#0`
KX3A|
import org.rut.util.algorithm.support.BubbleSort; uJlW$Oc:.
import org.rut.util.algorithm.support.HeapSort; yyk@f%
import org.rut.util.algorithm.support.ImprovedMergeSort; T@`Al('
import org.rut.util.algorithm.support.ImprovedQuickSort; >)u{%@Rcy{
import org.rut.util.algorithm.support.InsertSort; c10$5V&@
import org.rut.util.algorithm.support.MergeSort; 717G CL@
import org.rut.util.algorithm.support.QuickSort; _yX.Apv]
import org.rut.util.algorithm.support.SelectionSort; fP6.
import org.rut.util.algorithm.support.ShellSort; QC!SgV
^fyue~9u
/** ,KD?kSIf
* @author treeroot z;?j+ZsdH
* @since 2006-2-2 Fa\jVFIQ
* @version 1.0 ?Z4%u8Krvz
*/ Vy|4k2
public class SortUtil { Rry]6(
public final static int INSERT = 1; :bi(mX7t
public final static int BUBBLE = 2; WRA(k
public final static int SELECTION = 3; /u_9uJ"-K(
public final static int SHELL = 4; l]#=I7 6
public final static int QUICK = 5; 7lA_*t@y
public final static int IMPROVED_QUICK = 6; kj.9\
public final static int MERGE = 7; ?FUK_]
public final static int IMPROVED_MERGE = 8; +]zRn
public final static int HEAP = 9; #D%6b
XN>bv|*q
public static void sort(int[] data) { BjsTHS&
sort(data, IMPROVED_QUICK); fLd2{jI,
} &cJ?mSI
private static String[] name={ 7&OJ8B/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AaoS &q
}; NQ;$V:s)
)''V}Zn.X
private static Sort[] impl=new Sort[]{ EaHJl
new InsertSort(), uFb 9Ic]`
new BubbleSort(), 5W&L cBB
new SelectionSort(), 6$f\#TR
new ShellSort(), 80T2EN:$
new QuickSort(), S("dU`T?
new ImprovedQuickSort(), _d!o,=}
new MergeSort(), $-~"G,;F
new ImprovedMergeSort(), #B6f{D[pI
new HeapSort() #`f{\
}; ~b!la
tJn"$A^N
public static String toString(int algorithm){ "vQ%` Q
return name[algorithm-1]; RLL%l
} A%7f;&x!
LH=^3Gw
public static void sort(int[] data, int algorithm) { diVg|Z3T
impl[algorithm-1].sort(data); H?a $o(
} "frioi`a2
-^(KGu&L&u
public static interface Sort { r>i95u82'
public void sort(int[] data); 4zt:3bWU
} 12hD*,A5j
XGbpH<
public static void swap(int[] data, int i, int j) { mk^,{D
int temp = data; dKC*QHU
data = data[j]; 7:Rt) EE2
data[j] = temp; 3 =c#LUA`
} ;m>/tD%
} wfEL .h