[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; kj|6iG
} 6 +Sxr
int i1=l; z F_M*8=
int i2=mid+1; &LmJ!^#
for(int cur=l;cur<=r;cur++){ 4ae`pAu
if(i1==mid+1) ?# Mr
data[cur]=temp[i2++]; 2`AY~i9
else if(i2>r) ucuSe!IcX
data[cur]=temp[i1++]; :lX!\(E2
else if(temp[i1] data[cur]=temp[i1++]; H;D>|q
else Qwz}B
data[cur]=temp[i2++]; )bA;?i
} Bt[/0>i
} \@-@Y
o=u3&liBi
} b[__1E9v'
$[9%QQk5<L
改进后的归并排序: n+! AnKq
Gn22<C/
package org.rut.util.algorithm.support; E_gD:PPU5
t![7uU.W
import org.rut.util.algorithm.SortUtil; Qf58ig-vCY
2{M^,=^>
/** VGLaN%|
* @author treeroot !*/*8re
* @since 2006-2-2 Nw:GCf-L
* @version 1.0 yTyj'-4
*/ cO-7ke
public class ImprovedMergeSort implements SortUtil.Sort { |$+3a
ZkgV_<M|
private static final int THRESHOLD = 10; G=)i{oC
+QB"8-
/* IWBX'|}K
* (non-Javadoc) :KH g&ZX7
* Q.bXM?V)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A_n7w
*/ pEw"8U
public void sort(int[] data) { !y#"l$"xK
int[] temp=new int[data.length]; <3(LWxw
mergeSort(data,temp,0,data.length-1); uvgdY
} h}-3\8 >
{Z{75}
private void mergeSort(int[] data, int[] temp, int l, int r) { TH)"wNa
int i, j, k; hrmut*<|
int mid = (l + r) / 2; yhlFFbU
if (l == r) ?8HHA:GP
return; ::o lN
if ((mid - l) >= THRESHOLD) _t:$XJ`bTk
mergeSort(data, temp, l, mid); }L &^xe
else X#d~zk[r2
insertSort(data, l, mid - l + 1); J2d.f}-
if ((r - mid) > THRESHOLD) s.EI`*xylY
mergeSort(data, temp, mid + 1, r); eD-#b|
else R|JC1f8P5
insertSort(data, mid + 1, r - mid); `id9j
mCRt8rY;
for (i = l; i <= mid; i++) { ;g8R4!J
temp = data; so^lb?g
} >82@Q^O
for (j = 1; j <= r - mid; j++) { YgKZ#?*
temp[r - j + 1] = data[j + mid]; YX%[ipgB
} H/,gro
int a = temp[l]; z|fmrwkN'$
int b = temp[r]; })uGRvz
for (i = l, j = r, k = l; k <= r; k++) { 9s_vL9u
if (a < b) { xrlmKSPa
data[k] = temp[i++]; =nz}XH%=
a = temp; >d~WH@o`G
} else { PEc,l>u9
data[k] = temp[j--]; Gb"r|(!
b = temp[j]; 8m5p_\&
} P D4Tz!F
} $ oTdfb
} NHB4y/2
SH3|sXH<
/** _AYXc] 4%
* @param data OtSL*'7>
* @param l c/Qt Ot
* @param i J~=n`pW
*/ >oea{u
private void insertSort(int[] data, int start, int len) { )S`jFQ1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ktI/3Mb@
} n 9\ C2r
} tc_286'x
} D@G\7KH@
} )64@2~4y
BeCWa>54i
堆排序： ^ K|;~}P
%R1tJ(/
package org.rut.util.algorithm.support; )X04K~6lY
:z}MIuf
import org.rut.util.algorithm.SortUtil; El<]b7
Rfn9s(m
/** l6(-I Tb
* @author treeroot h H <J,Wn
* @since 2006-2-2 O#&c6MDB:
* @version 1.0 0ph{
*/ .tkT<o-u<J
public class HeapSort implements SortUtil.Sort{ "@evXql3`
OQ8 bI=?[x
/* (non-Javadoc) m#ZO`W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U ?'vXa
*/ C(S'#cm
public void sort(int[] data) { tcI}Ca>u
MaxHeap h=new MaxHeap(); x2@U.r"zo
h.init(data); 0_k'.5l%
for(int i=0;i h.remove(); &GNxo$CG
System.arraycopy(h.queue,1,data,0,data.length); v4?x.I
} Jwj%_<
/V=24\1Ky
private static class MaxHeap{ 6}75iIKi
";BlIovT=R
void init(int[] data){ 9V,!R{kO!
this.queue=new int[data.length+1]; :*t"8;O[
for(int i=0;i queue[++size]=data; =81@o,1w
fixUp(size); VmCW6 G#M
} :q ti
} ii%+jdi.
i.=w]S j
private int size=0; iP@ZM=&wz
|UP `B|
private int[] queue; YWMGB#=
PN0VQ/..
public int get() { 1J6,]M
return queue[1]; "oWwc zzO
} MepuIh
!icT/5
public void remove() { iZPCNS"
SortUtil.swap(queue,1,size--); V~S0hqW[
fixDown(1); 0OT\"O~S[
} ~ns7O
file://fixdown \I["2C]3M
private void fixDown(int k) { !1n8vzs"c
int j; :gerQz4R8
while ((j = k << 1) <= size) { |?Frj
if (j < size %26amp;%26amp; queue[j] j++; ( xXGSx
if (queue[k]>queue[j]) file://不用交换 0ge$ p,
break; \=+b}mKV m
SortUtil.swap(queue,j,k); )foq),2
k = j; N-jTc?mT~&
} "8~:[G#
} Glxuz0]
private void fixUp(int k) { N;Dni#tQ`
while (k > 1) { z^_*&
int j = k >> 1; `Q+(LBP
if (queue[j]>queue[k]) s"9`s_p`d
break; b3S.-W{p.
SortUtil.swap(queue,j,k); 8%%f%y
k = j; .~Fp)O:!
} TlI<1/fP}
} fBgEnz/
!_+8A/
} 8~9030>Q
@Ukr
} <EPj$::
gzBy?r> r
SortUtil： |u0(t,T
AtU v71D:
package org.rut.util.algorithm; (Fynok
fGw^:,B
import org.rut.util.algorithm.support.BubbleSort; y_*PQZ$c<
import org.rut.util.algorithm.support.HeapSort; {88gW\GL
import org.rut.util.algorithm.support.ImprovedMergeSort; UbEb&9}
import org.rut.util.algorithm.support.ImprovedQuickSort; CPVjmRUF|
import org.rut.util.algorithm.support.InsertSort; lY~4'8^
import org.rut.util.algorithm.support.MergeSort; %STliJ
import org.rut.util.algorithm.support.QuickSort; %|^OOU}
import org.rut.util.algorithm.support.SelectionSort; )x}l3\s
import org.rut.util.algorithm.support.ShellSort; *<E]E?
'xhcuVl
/** d)@<W1;
* @author treeroot G P:FSprP
* @since 2006-2-2 ?."&MZ
* @version 1.0 $U$V?xuE
*/ |+35y_i6
public class SortUtil { z\0CE]#T
public final static int INSERT = 1; tp6M=MC%
public final static int BUBBLE = 2; eh4gQ^l
public final static int SELECTION = 3; 28/ ADZ
public final static int SHELL = 4; mNb ?*3\
public final static int QUICK = 5; V$"ujRp
public final static int IMPROVED_QUICK = 6; QCH}-q)
public final static int MERGE = 7; `(1K
public final static int IMPROVED_MERGE = 8; :C}2=
public final static int HEAP = 9; 2<`.#zIds
txZ?=8j_Y
public static void sort(int[] data) { neXeAU
sort(data, IMPROVED_QUICK); -zp0S*iP7
} ?OE.O/~l
private static String[] name={ d"5oD@JG:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vKq^D(&cl
}; |o2sbLp
7_.11$E=H
private static Sort[] impl=new Sort[]{ ,g7.rEA
new InsertSort(), a-"k/P#
new BubbleSort(), "V>R9dO{"!
new SelectionSort(), Cw~RJ^a_
new ShellSort(), Yk'9U-.mc
new QuickSort(), PzV@umC1#f
new ImprovedQuickSort(), B|C/ Rk6?
new MergeSort(), +$$$
new ImprovedMergeSort(), #'-Sh7ycW
new HeapSort() UK$ms~H
}; `6[I^qG".
^K7ic,{
public static String toString(int algorithm){ %.<H=!$
return name[algorithm-1]; ?Zc"C
} Rx*BwZ
`%E8-]{uS
public static void sort(int[] data, int algorithm) { X=6y_^
impl[algorithm-1].sort(data); \S*$UE]uG
} ,bM-I2BR
ly4s"4v
public static interface Sort { P7 ]z
public void sort(int[] data); Q~MC7-n>
} Q.9qImgN
5GA\xM-
public static void swap(int[] data, int i, int j) { /^$UhX9v
int temp = data; 5aBAr
data = data[j]; A%Xt|=^_
data[j] = temp; Yz4_vePh+5
} N%7{J
} V~T@6S