[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; $?: -A
} b,HXD~=
int i1=l; &C,]c#-+
int i2=mid+1; H!y@.W{_
for(int cur=l;cur<=r;cur++){ @AG=Eq9<o
if(i1==mid+1) yF` (GU
data[cur]=temp[i2++]; P'_ aNU
else if(i2>r) xop\W4s_
data[cur]=temp[i1++]; .*EP$pc
else if(temp[i1] data[cur]=temp[i1++]; K24y;968
else Q4ii25]*
data[cur]=temp[i2++]; IP !zg|c,
} IMSm
} QKz2ONV=)
Q(8W5Fb?
} c$A}mL_
e!i.u'z
改进后的归并排序: =|-xj h
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package org.rut.util.algorithm.support; bg4VHT7?>)
d9D*w/clMi
import org.rut.util.algorithm.SortUtil; #2.C$
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/** mn<ea&
* @author treeroot *LmzGF|
* @since 2006-2-2 U_B`SS
* @version 1.0 A^c5CJ_
*/ =g@hh)3wP
public class ImprovedMergeSort implements SortUtil.Sort { #@5 jOi
CA"`7<,
private static final int THRESHOLD = 10; n |,}
4P24ySy9F
/* B;{sr'CP
* (non-Javadoc) 9qZ|=r]y'
* 9*|An
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ke&fTK
*/ nDchLVw
public void sort(int[] data) { t^9q>[/d`
int[] temp=new int[data.length]; HZ2zL17
mergeSort(data,temp,0,data.length-1); KRcg
} f;ycQc@f
~0.@1zEXj
private void mergeSort(int[] data, int[] temp, int l, int r) { YX2j;Y?
int i, j, k; pk=z<OTb
int mid = (l + r) / 2; M[T!AO-S$
if (l == r) p:U{3uN 62
return; 3^&pb
if ((mid - l) >= THRESHOLD) t;ga>^NA"
mergeSort(data, temp, l, mid); 483vFLnF
else QaEXk5>e
insertSort(data, l, mid - l + 1); KQqQ@D&n
if ((r - mid) > THRESHOLD) tX}Fb0y
mergeSort(data, temp, mid + 1, r); `+@%l*TQ
else [c6_6q As
insertSort(data, mid + 1, r - mid); Fn%:0j
Md m(xUs
for (i = l; i <= mid; i++) { })w5`?Y
temp = data; a-DE-V Uls
} :Ws3+OI'm3
for (j = 1; j <= r - mid; j++) { Nb{oH+$b
temp[r - j + 1] = data[j + mid]; `wG&Cy]v
} %nc+VL4
int a = temp[l]; cKy%0oTla
int b = temp[r]; |b7>kM}"
for (i = l, j = r, k = l; k <= r; k++) { {k~$\J?.
if (a < b) { 17qrBG-/MD
data[k] = temp[i++]; ck<4_?1]
a = temp; K<_H`k*x
} else { <$9AP
data[k] = temp[j--]; CnA*o 8w
b = temp[j]; zKWi9
} S"Zs'7dy`
} pK1(AV'L
} |s`q+ U-
m :^,qC
/** Ox43(S0~
* @param data eaiz w@N
* @param l ~d5{Q?T)
* @param i sQH.}W$C
*/ )d1,}o
private void insertSort(int[] data, int start, int len) { AU$5"kBE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %I=J8$B]f
} {5z?5i ?D
} 9hp0wi@W}
} ,!py n<_
} =O_[9kuJ
02S(9^=
堆排序： 2Uk8{d
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package org.rut.util.algorithm.support; E0h!%/+-L
kI;^V
import org.rut.util.algorithm.SortUtil; WK^qYfq|
U&a]gkr
/** 9VY_gi=vL
* @author treeroot t[ MRyi)LF
* @since 2006-2-2 ?^+|V,<
* @version 1.0 q B2#EsZ
*/ |O+binq
public class HeapSort implements SortUtil.Sort{ \%^3Izsc
LOYv%9$0*p
/* (non-Javadoc) jH G(d$h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aH#|LrdJ
*/ nBj7Q!lW
public void sort(int[] data) { Fu><lN7
MaxHeap h=new MaxHeap(); 4%{m7CK}
h.init(data); liB>~DVC
for(int i=0;i h.remove(); _0`O}
System.arraycopy(h.queue,1,data,0,data.length); .lnD]Q
} O&0R ~<n
[(K^x?\Y0'
private static class MaxHeap{ dk ?0r
,J#5Y.
void init(int[] data){ >) ^!gz8
this.queue=new int[data.length+1]; 7I
for(int i=0;i queue[++size]=data; 8vP)qy8
fixUp(size); /L8=8
} D.GSl
} n#fg7d%
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private int size=0; Aws TDM
_[7uLWyC9
private int[] queue; MG@19R2s
Dx%fW`
public int get() { ;g*6NzdA
return queue[1]; (^4%Fk&I-
} _8>"&1n
~!OjdE!u
public void remove() { U#P#YpD;==
SortUtil.swap(queue,1,size--); y%y#Pb|
fixDown(1); q.t5L=l^ r
} mB~&nDU
file://fixdown PrcM'Q
private void fixDown(int k) { $p@g#3X`
int j; lo#,zd~
while ((j = k << 1) <= size) { IR&u55#I6
if (j < size %26amp;%26amp; queue[j] j++; PTh Ya
if (queue[k]>queue[j]) file://不用交换 s5dh]vNN
break; VQ;=-95P
SortUtil.swap(queue,j,k); Xz@>sY>Jc
k = j; "8I4]'
} T_dd7Ym'8
} \NqC i'&
private void fixUp(int k) { (65p/$Vh
while (k > 1) { J@fE")
int j = k >> 1; 4SrK]+|
if (queue[j]>queue[k]) ^s*} 0
break; )wRD
SortUtil.swap(queue,j,k); {1+H\(v
k = j; FRW.
} 8FITcK^
} A0ToX) |C
!ZZAI_N
} SOL=3hfb^
>vU Hf`4T
} bW]+Og
+9J>'oe'D
SortUtil： ^b~5zhY&
JNz0!wi
package org.rut.util.algorithm; df'g},_
L9@jmh*E
import org.rut.util.algorithm.support.BubbleSort; UK,P?_e
import org.rut.util.algorithm.support.HeapSort; K/-D 5U
import org.rut.util.algorithm.support.ImprovedMergeSort; As`^Ku&
import org.rut.util.algorithm.support.ImprovedQuickSort; ;=OH=+Rl
import org.rut.util.algorithm.support.InsertSort; 5PPpX=\
import org.rut.util.algorithm.support.MergeSort; oX~CTunP
import org.rut.util.algorithm.support.QuickSort; 4#w^PM8}
import org.rut.util.algorithm.support.SelectionSort; LayU)TIt
import org.rut.util.algorithm.support.ShellSort; 8gNEL+
\YS?}! 0
/** nz\fN?q
* @author treeroot rWXW}Yg
* @since 2006-2-2 |9I;`{@
* @version 1.0 O)R0,OPb
*/ B .mV\W
public class SortUtil { M}Mzm2d#`
public final static int INSERT = 1; 4;||g@f'[
public final static int BUBBLE = 2; $EIkk= z
public final static int SELECTION = 3; D,/9rH
public final static int SHELL = 4; Ah6x2(:
public final static int QUICK = 5; 08a|]li
public final static int IMPROVED_QUICK = 6; [Bo$?
public final static int MERGE = 7; KF)i66
public final static int IMPROVED_MERGE = 8; +IYSWR
public final static int HEAP = 9; sh2bhv]
[\1l4C
public static void sort(int[] data) { vNbA/sM
sort(data, IMPROVED_QUICK); mtHz6+
} aw1J#5j`n
private static String[] name={ M'iKk[Hjfx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~@a R5Q>us
}; f,>i%.
ex458^N_
private static Sort[] impl=new Sort[]{ h :R)KM
new InsertSort(), 0)!zhO_}
new BubbleSort(), ,be?GAq
new SelectionSort(), m5N&7qgp
new ShellSort(), wlM ?gQXU[
new QuickSort(), w ZAXfNA
new ImprovedQuickSort(), ~0|hobk
new MergeSort(), 2\de|'
new ImprovedMergeSort(), ~*Qpv&y)
new HeapSort() [)~@NN
}; 59J9V3na
UAZ&*{MM^
public static String toString(int algorithm){ hJsC \C,^
return name[algorithm-1]; 4 G[hU4L
} Yur)_m
@/L. BfTz
public static void sort(int[] data, int algorithm) { |$2N$6\SP
impl[algorithm-1].sort(data); J *?_SnZ
} Vz]=J;`Mz
C:MGi7f
public static interface Sort { x~^I/$
public void sort(int[] data); z_@zMLs
} FaE orQ
g"S+V#R
public static void swap(int[] data, int i, int j) { d A{Jk
int temp = data; |"w<CKlQ
data = data[j]; J94YMyOo
data[j] = temp; @0,dyg<$>
} a|uZJ*
} `r(J6,O