[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; RzG<&a3B3s
} ssv4#8p3
int i1=l; f)p c$~B
int i2=mid+1; =IH z@CU
for(int cur=l;cur<=r;cur++){ !xm87I
if(i1==mid+1) MXWCYi
data[cur]=temp[i2++]; ;Jex#+H(:D
else if(i2>r) o7N3:)
data[cur]=temp[i1++]; J;pn5k~3
else if(temp[i1] data[cur]=temp[i1++]; Tti]H9g_
else N'nI ^=
data[cur]=temp[i2++]; ]Ma2*E!p
} $*ujX,}xG
} zT[[WY4
:^+ aJ]
} K8{Ub
tkBp?Wl
改进后的归并排序: 0p\cDrB?
Y4]USU!PA
package org.rut.util.algorithm.support; zK`z*\
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import org.rut.util.algorithm.SortUtil; /xmUu0H$R
>1[Hk0 <x
/** Omkl|l9
* @author treeroot wV- kB4^4
* @since 2006-2-2 &BnK[Q8X
* @version 1.0 F.)b`:g
*/ x4jn45]x@
public class ImprovedMergeSort implements SortUtil.Sort { #F\}PCBe'
5`oVyxJ<
private static final int THRESHOLD = 10; +5Yf9
yjUSM}$
/* %/17K2g
* (non-Javadoc) Yb8o`j+t
* yDBS : \
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #<20vdc
*/ yk1syN_
public void sort(int[] data) { XkZ82w#b
int[] temp=new int[data.length]; @G0k+
mergeSort(data,temp,0,data.length-1); \'I->O]
} .80^c
0*S2_&Q)
private void mergeSort(int[] data, int[] temp, int l, int r) { gbOd(ugH
int i, j, k; bKsl'3~ k
int mid = (l + r) / 2; IP'gN-#i
if (l == r) Wpo:'?!(M^
return; P!qU8AJkt
if ((mid - l) >= THRESHOLD) ZOGH.`
mergeSort(data, temp, l, mid); [m7^Euury
else 8<}f:9/
insertSort(data, l, mid - l + 1); |7Z7_YWs
if ((r - mid) > THRESHOLD) (J(JB}[X,
mergeSort(data, temp, mid + 1, r); 'ojI_%9<
else KD9Y
insertSort(data, mid + 1, r - mid); ~C6Qp`VF
]K'iCYY
for (i = l; i <= mid; i++) { "f|\":\
temp = data; ~GJJ{Bm_
} GQXN1R
for (j = 1; j <= r - mid; j++) { 3-4' x2
temp[r - j + 1] = data[j + mid]; o:u *E
} :Hdn&a i
int a = temp[l]; 2x-67_BHY=
int b = temp[r]; W]p)}#FR
for (i = l, j = r, k = l; k <= r; k++) { 0\f3La
if (a < b) { r'7>J:cy=
data[k] = temp[i++]; Bd$i%.r
a = temp; @RW=(&<1
} else { E"7 iU
data[k] = temp[j--]; 5tMp@$F\{[
b = temp[j]; 5/<?Y&x
} vzVXRX
} zj.;O#hW
} >]?!c5=
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/** P#5&D*`}h
* @param data `~'yy q
* @param l GaMiu!|,
* @param i 9$7tB
*/ HMT^gmF)
private void insertSort(int[] data, int start, int len) { F.i%o2P3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y21zaQ
} D~W1["[
} ~ow_&ftlo
} D6 B(6 5Y
} ^nn3;
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堆排序： #w3cImgp2
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package org.rut.util.algorithm.support; L=W8Q8hf
[5$=G@ zf
import org.rut.util.algorithm.SortUtil; Q C?*O?~#
dLQV>oF
/** A7!!kR":
* @author treeroot :=u Ku'~
* @since 2006-2-2 c}K>#{YeB
* @version 1.0 R(Y4nw+Y-
*/ Jybx'vZj
public class HeapSort implements SortUtil.Sort{ ]i\C4*
Gz)]1Z{%$
/* (non-Javadoc) ,zmGKn#n2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z7X[$T$V
*/ _:4n&1{.E
public void sort(int[] data) { _&s37A&\
MaxHeap h=new MaxHeap(); O4xV "\
h.init(data); 3#7D g't
for(int i=0;i h.remove(); vCE1R]^A.]
System.arraycopy(h.queue,1,data,0,data.length); ~D1.opj3
} Tdvw7I-q
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private static class MaxHeap{ w.kb/
^M60#gJ
void init(int[] data){ u\gPx4]4c
this.queue=new int[data.length+1]; _bp9UJ
for(int i=0;i queue[++size]=data; NWCJ|
fixUp(size); Wt2+D{@8
} `* !t<?$i
} |/B2Bm
i}mvKV?!|1
private int size=0; (~t/8!7N
k[3J5 4`g1
private int[] queue; f(Jz*el S
z?V'1L1gM
public int get() { h\GlyH~
return queue[1]; h?H:r <
} G @ib
J}IHQZS
public void remove() { m}Z=m8
SortUtil.swap(queue,1,size--); >P*wK9|(
fixDown(1); JA'C\
} 67zCil
file://fixdown !Oj]. WQ
private void fixDown(int k) { F.:B_t
int j; H%c:f
while ((j = k << 1) <= size) { D&KD5_Sw
if (j < size %26amp;%26amp; queue[j] j++; iYE:o{
if (queue[k]>queue[j]) file://不用交换 9(`d h
break; i^LLKx7M&
SortUtil.swap(queue,j,k); kI5`[\
k = j; Y{~[N yE
} fv?vO2nj
} ^Y"c1f2
private void fixUp(int k) { `em}vdY
while (k > 1) { '5j$wr zt
int j = k >> 1; QAiont ,!
if (queue[j]>queue[k]) -A}U^-'a}
break; 5AV5`<r.
SortUtil.swap(queue,j,k); P~Cx#`#(V
k = j; <C0~7]XO
} %<cfjo
} *^]Hqf(`
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} EN^C'n
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} A8bDg:G1i
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SortUtil： ^^MVd@,i
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package org.rut.util.algorithm; +D ,Nd=/
vvEr}G
import org.rut.util.algorithm.support.BubbleSort; BfmSM9
import org.rut.util.algorithm.support.HeapSort; 4Eq$f (QJ
import org.rut.util.algorithm.support.ImprovedMergeSort; |FK##8
import org.rut.util.algorithm.support.ImprovedQuickSort; dq$H^BB+>
import org.rut.util.algorithm.support.InsertSort; nZ>8r
import org.rut.util.algorithm.support.MergeSort; dD _(MbTt
import org.rut.util.algorithm.support.QuickSort; .6I*=qv)NA
import org.rut.util.algorithm.support.SelectionSort; L[4Su;D
import org.rut.util.algorithm.support.ShellSort; Ji<^s@8Zc
LIM cZh;
/** #sLyU4QV
* @author treeroot )%D2JC
* @since 2006-2-2 @SH%l]
* @version 1.0 x^_(gve:
*/ qi!Nv$e
public class SortUtil { mx`C6G5
public final static int INSERT = 1; +r0ItqkM
public final static int BUBBLE = 2; Z]H`s{3
public final static int SELECTION = 3; rp*f)rJ
public final static int SHELL = 4; C^sHj5\(
public final static int QUICK = 5; c#lW ?
public final static int IMPROVED_QUICK = 6; NY.Y=CF("
public final static int MERGE = 7; 7aAT
public final static int IMPROVED_MERGE = 8; R7xKVS_MP
public final static int HEAP = 9; @I{v
}*4K{<02
public static void sort(int[] data) { G,+-}~$_
sort(data, IMPROVED_QUICK); L`>uO1O
} fI:j@Wug
private static String[] name={ \nQV{J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l(;~9u0sa
}; q'u^v PO
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private static Sort[] impl=new Sort[]{ :CH?,x^!@
new InsertSort(), * !4r}h`
new BubbleSort(), ? OrRTRW
new SelectionSort(), <3aiS?i.h
new ShellSort(), f=0U&~
new QuickSort(), H^UuT
new ImprovedQuickSort(), bB01aiUw@l
new MergeSort(), m0I/X$-Cl5
new ImprovedMergeSort(), \4;}S&`k
new HeapSort() G$b*N4yR
}; y#%*aV}|B
?f{{{0$S
public static String toString(int algorithm){ u,]?_bK)
return name[algorithm-1]; &DnX6%2
} RLuA^ONI
X%iiz
public static void sort(int[] data, int algorithm) { ,Jqi J?,4C
impl[algorithm-1].sort(data); Uy8r !9O
} {FV_APL9_
Ja$Ple*XU8
public static interface Sort { k%UE^
public void sort(int[] data); 5X2&hG*
} 5[^pU$Y
\*5`@>_
public static void swap(int[] data, int i, int j) { v[S>
int temp = data; Tk(ciwB
data = data[j]; ZaxBr
data[j] = temp; sxac(L
} \F_~?$
} -oSfp23u