[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; k9<UDg_ Y
} _x3=i\O,
int i1=l; ^);M}~
int i2=mid+1; %n8CK->
for(int cur=l;cur<=r;cur++){ u0,QsD)_X0
if(i1==mid+1) )ZBNw{nh
data[cur]=temp[i2++]; n-],!pL^
else if(i2>r) ?daxb
data[cur]=temp[i1++]; 2kDv (".
else if(temp[i1] data[cur]=temp[i1++]; -K(d]-yv
else Yb_HvP
data[cur]=temp[i2++]; D)DD6
} S@S4<R1{\
} /\uopa
'UxI-Lt
} m&DI2he
@9n|5.i
改进后的归并排序: YcclO
]h' 38W
package org.rut.util.algorithm.support; .-mIU.Nwi
DO~[VK%|
import org.rut.util.algorithm.SortUtil; j[FB*L1!D
b]Kb ~y|
/** U#K4)(C
* @author treeroot ~o|sma5.
* @since 2006-2-2 C4`&_yoP4-
* @version 1.0 IDD`N{EA
*/ TQNdBq5I6
public class ImprovedMergeSort implements SortUtil.Sort { 89GW!
XTk :lzFH
private static final int THRESHOLD = 10; |2n*Ds'
(Fuu V{x|
/* WAR!#E#J7
* (non-Javadoc) _e;bB?S
* *i#N50k*j'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 67&Q<`V1*q
*/ DNqV]N_W
public void sort(int[] data) { )V>zXy}Y
int[] temp=new int[data.length]; do.>Y}d
mergeSort(data,temp,0,data.length-1); ::iYydpM
} 4F0w+wJD
Vn:v{-i
private void mergeSort(int[] data, int[] temp, int l, int r) { l;A'^
int i, j, k; \v\ONp"
int mid = (l + r) / 2; );TB(PQsBT
if (l == r) dY0W=,X$7T
return; 5pDE!6gQ
if ((mid - l) >= THRESHOLD) );}M"W8
mergeSort(data, temp, l, mid); y=f.;
else a73VDQr I
insertSort(data, l, mid - l + 1); .m8l\h^3
if ((r - mid) > THRESHOLD) KnA BFH
mergeSort(data, temp, mid + 1, r); @NL<v-t
else 2)\MxvfOh
insertSort(data, mid + 1, r - mid); C;/ONF
.|g@#XIwe#
for (i = l; i <= mid; i++) { Mt`LOdiC_
temp = data; eN </H.bm]
} NS`hXf
for (j = 1; j <= r - mid; j++) { Bw!J!cCj
temp[r - j + 1] = data[j + mid]; z;e@m2.IM
} :@P6ibcX
int a = temp[l]; cZF|oZ6<
int b = temp[r]; @4Bl&(3S
for (i = l, j = r, k = l; k <= r; k++) { Xf#;`*5
if (a < b) { :E|Jqi\
data[k] = temp[i++]; "nfi:A1
a = temp; WbhYGcRy
} else { xg^%8Ls^
data[k] = temp[j--]; SSla^,MHef
b = temp[j]; lX2:8$?X
} O43"-
} R[m{"2|,Lc
} =-/'$7R,
{dxl8~/I
/** H Q[
* @param data n{L^W5B
* @param l v@SHR0
* @param i .bP8Z=
*/ e&:%Rr]x
private void insertSort(int[] data, int start, int len) { L'`Au/%S}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LJb=9tp~
} e1JHN
} lg2I|Z6DH
} [\<#iRcP
} 8au Gz ,"
R2{]R&wtn0
堆排序： nsXG@CS:
-zJV(`
package org.rut.util.algorithm.support; nHDKe)V
4VeT]`C^h
import org.rut.util.algorithm.SortUtil; !s/qqq:g
Qnt}:M+
/** Nl,iz_2]
* @author treeroot +$VDV4l
* @since 2006-2-2 5bXpj86mY
* @version 1.0 P2`F" Qsq
*/ (;05=DsO
public class HeapSort implements SortUtil.Sort{ WoB'B|%
[N~-9
/* (non-Javadoc) YqWNp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 09P2<oFLn
*/ u9,dSR
public void sort(int[] data) { ZnAQO3%y
MaxHeap h=new MaxHeap(); d/Wp>A@dob
h.init(data); W-|CK&1
for(int i=0;i h.remove(); <P0 P*>M
System.arraycopy(h.queue,1,data,0,data.length); TJW8l[M
} *HHL a
[:(O`#
private static class MaxHeap{ K re*~ "
[PiMu,O[v
void init(int[] data){ SEg{Gso9b
this.queue=new int[data.length+1]; we!w5./Xm
for(int i=0;i queue[++size]=data; g$"x,:2x{
fixUp(size); ujBm"p_|
} B:UPSX)A
} %uV,p!| )
:6)!#q'g
private int size=0; \nuzl
3_boEYl0
private int[] queue; X6$Cd]MN
HOH5_E>d
public int get() { }aa]1X(u
return queue[1]; /g9^g(
} \8\TTkVSq
3*j1v:x`
public void remove() { CH!\uK22
SortUtil.swap(queue,1,size--); t.RDS2N|
fixDown(1); c2:,
} e&8Meiv+d
file://fixdown NRP)'E
private void fixDown(int k) { 3$K[(>s
int j; [okV[7
while ((j = k << 1) <= size) { Kx,X{$Pe
if (j < size %26amp;%26amp; queue[j] j++; sm G?y~
if (queue[k]>queue[j]) file://不用交换 TxN+-< f
break; L[Y$ `e{zd
SortUtil.swap(queue,j,k); {2 T:4i5
k = j; F=*t]X[z}
} #hs&)6Sf
} QhRj*,
private void fixUp(int k) { Pj g#
while (k > 1) { ('j'>"1H
int j = k >> 1; g[@0H=
if (queue[j]>queue[k]) Ge?DD,ac
break; Gx4uf
SortUtil.swap(queue,j,k); B%tj-h(a
k = j; R8!~>$#C6)
} Gf.xr%mUZr
} nZL!}3@<
+Lc+"0*gV*
} 'Pn:10;
fy$CtQM
} 5"!K8 N
z52F-<
SortUtil： (;9fkqm%m
K%t&aRjS
package org.rut.util.algorithm; +"WNG
uX{g4#eG
import org.rut.util.algorithm.support.BubbleSort; TPkP5w
import org.rut.util.algorithm.support.HeapSort; A~k: m0MX
import org.rut.util.algorithm.support.ImprovedMergeSort; 7TypzgXNe
import org.rut.util.algorithm.support.ImprovedQuickSort; vmfFR
import org.rut.util.algorithm.support.InsertSort; ^e =xEZD
import org.rut.util.algorithm.support.MergeSort; q%f90
import org.rut.util.algorithm.support.QuickSort; 9h-S,q!
import org.rut.util.algorithm.support.SelectionSort; :nqDX
import org.rut.util.algorithm.support.ShellSort; !{(crfXB
QFhyidm=]
/** Pd d(1K*
* @author treeroot 3^q9ll7Op
* @since 2006-2-2 l6xqc,h!K
* @version 1.0 7oUo[
*/ Rw[!Jq
public class SortUtil { 8(q8}s$>
public final static int INSERT = 1; #_3-(H5u
public final static int BUBBLE = 2; F2<Q~gQ;
public final static int SELECTION = 3; SLNOOEN
public final static int SHELL = 4; P$AHw;n[R
public final static int QUICK = 5; 3&c'3y:b
public final static int IMPROVED_QUICK = 6; ^:f)XZ
public final static int MERGE = 7; }> C?Zx*
public final static int IMPROVED_MERGE = 8; t)k;5B`> &
public final static int HEAP = 9; egfd=z=2un
4PU@W o
public static void sort(int[] data) { D0S^Msk9L
sort(data, IMPROVED_QUICK); )ytP$,r![S
} :AuKQ`c
private static String[] name={ OzRo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !rqs!-cCQ
}; :l Z\=2D
8/,s8u
private static Sort[] impl=new Sort[]{ } MP_
new InsertSort(), 3y:),;|5
new BubbleSort(), ab)ckRC
new SelectionSort(), ga;t`5+d
new ShellSort(), F60m]NUM)c
new QuickSort(), KqaEHL
new ImprovedQuickSort(), }PDtx:T-
new MergeSort(), AtAu$"ue
new ImprovedMergeSort(), 6*>vie
new HeapSort() ]:?hU^H]<
}; ?=kH}'igq
7Ot&]M
public static String toString(int algorithm){ ?G&J_L=@Y
return name[algorithm-1]; S4(?=,^-
} tI9p2!
9v ,y
public static void sort(int[] data, int algorithm) { ~Z#\f5yv@
impl[algorithm-1].sort(data); [fkt3fS
} |-GbHfz
f!GFRMM1
public static interface Sort { QT1oUP#*
public void sort(int[] data); Q4N0j' QA
} wn<k"6x
gMZrtK`<
public static void swap(int[] data, int i, int j) { >k/ rJ[Sc
int temp = data; !|ic{1!_
data = data[j]; 5Go@1X]I
data[j] = temp; wb]Z4/j#
} SEZ08:>x r
} r>"l:GZ