[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; JkWhYP}
} e O\72? K
int i1=l; Bh2l3J4X
int i2=mid+1; <[)-Q~Gg5
for(int cur=l;cur<=r;cur++){ nK :YbLdK,
if(i1==mid+1) ah:["< z<
data[cur]=temp[i2++]; |Q3d7y
else if(i2>r) &L$9Ii
data[cur]=temp[i1++]; ZI!:
else if(temp[i1] data[cur]=temp[i1++]; 1*u]v{JJ(
else 7Dbm s(:(
data[cur]=temp[i2++]; 4T(d9y
} O*l,&5
} (l^7EpNs
KhfADqji|
} JE-*o"&
Bk~C$'x4
改进后的归并排序: ?h&XIM(
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package org.rut.util.algorithm.support; H%@f ^
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import org.rut.util.algorithm.SortUtil; B1)Eo2i#
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/** _x<NGIz
* @author treeroot E+O{^C=
* @since 2006-2-2 hz4?ku
* @version 1.0 s6 g"uF>k
*/ dYrgL3'
public class ImprovedMergeSort implements SortUtil.Sort { ud`-w
]##aAh-P4&
private static final int THRESHOLD = 10; C*b[J
*uyP+f2O
/* X6G{.Vh"
* (non-Javadoc) ]qT&6:;-]
* 5q0L<GOrj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t|>zke!'
*/ s;9Du|0f^
public void sort(int[] data) { r)5xS]
int[] temp=new int[data.length]; 7yfh4-1M
mergeSort(data,temp,0,data.length-1); !l0]IX` F
} Jx.fDVJ
3@I0j/1#k1
private void mergeSort(int[] data, int[] temp, int l, int r) { />S^`KSTM
int i, j, k; -j3Lgm
int mid = (l + r) / 2; CK7([>2
if (l == r) HJAiQ[m5s
return; 0qJ (RB
if ((mid - l) >= THRESHOLD) JLE&nbKS
mergeSort(data, temp, l, mid); =NtHV4=b
else sr6BC.
insertSort(data, l, mid - l + 1); {h+8^
if ((r - mid) > THRESHOLD) Y.Zd_,qy
mergeSort(data, temp, mid + 1, r); |&=-Nm
else 2nkA%^tR
insertSort(data, mid + 1, r - mid); FYYc+6n
}:IIk-JoC
for (i = l; i <= mid; i++) { cpjwc@UMe
temp = data; H:c5 q0O^x
} Z&n[6aV'F
for (j = 1; j <= r - mid; j++) { (&e!u{I
temp[r - j + 1] = data[j + mid]; ki'$P.v{$w
} Xk4wU$1F
int a = temp[l]; 4$KDf;m@
int b = temp[r]; tS2&S 6u
for (i = l, j = r, k = l; k <= r; k++) { (kLaXayn
if (a < b) { @-)?uYw:r
data[k] = temp[i++]; ^y/Es2A#t
a = temp; {1Ra|,;
} else { (+|+ELfqW
data[k] = temp[j--]; 5I2,za&e
b = temp[j]; src9EeiV
} oFU:]+.+D
} 27D*FItc
} g3$'Ghf
!{jw!bB
/** x 7by|G(
* @param data z{L'7
* @param l 4{uQ}ea
* @param i =-si| 1Z
*/ Nbpn"*L,
private void insertSort(int[] data, int start, int len) { srv4kodj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G JRl{Y
} S1|u@d'
} `yv?PlKL
} eyMn! a
} a*cWj}u
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堆排序： $ZI]
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package org.rut.util.algorithm.support; E#KZZ lbx
r W`7<3
import org.rut.util.algorithm.SortUtil; 5b}w
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/** jKml:)k
* @author treeroot ?kO.>o
* @since 2006-2-2 g5nJ0=9
* @version 1.0 +LRKS
*/ 0/)2RmF
public class HeapSort implements SortUtil.Sort{ -iR2UE@M
dC({B3#e{
/* (non-Javadoc) qf x*a88
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sGu.G
*/ xT+_JT65
public void sort(int[] data) { O6G\0o
MaxHeap h=new MaxHeap(); KHAc!4lA
h.init(data); ~!Nj DDk
for(int i=0;i h.remove(); fmuh9Z
System.arraycopy(h.queue,1,data,0,data.length); Q-oDmjU
} GmB&TDm
,&UKsrs_
private static class MaxHeap{ a dqS.xs
x:FZEyalG
void init(int[] data){ w#b@6d
this.queue=new int[data.length+1]; zQyI4RHG[
for(int i=0;i queue[++size]=data; x &R9m,
fixUp(size); QR&e~rks
} _^BA;S@
} ^K<3_D>1>
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private int size=0; \78E>(`'
qYA~Os1e
private int[] queue; ZHNL~=r}
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public int get() { ,MXU]{
return queue[1]; T<B}Z11R
} 4QA~@pBX^{
a.V5fl0?I@
public void remove() { CV @P +
SortUtil.swap(queue,1,size--); |}4\Gm
fixDown(1); f}bq
} M^Sa{S*?
file://fixdown D}?p>e|<D
private void fixDown(int k) { 60~;UBm5O
int j; wtYgHC}X
while ((j = k << 1) <= size) { lbAhP+B
if (j < size %26amp;%26amp; queue[j] j++; Fx:38Ae
if (queue[k]>queue[j]) file://不用交换 >%tG[jb
break; lI?P_2AaS
SortUtil.swap(queue,j,k); k'st^1T
k = j; x4* bhiu
} +.!D>U$)}
} a$=~1@
private void fixUp(int k) { eUy*0
while (k > 1) { 5sT3|yq
int j = k >> 1; to?!qxn
if (queue[j]>queue[k]) 1sHjM%
break; $9`#p/V
SortUtil.swap(queue,j,k); uHKEt[PS$
k = j; *a Z1 4
} U823q-x
} M8~3 0L
#s{^fUN6
} '{ _ X1
\\R}3 >Wc
} AXlVH%'
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SortUtil： Rge>20uTl$
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package org.rut.util.algorithm; tKV,
"J"=<_?
import org.rut.util.algorithm.support.BubbleSort; 8._uwA<[
import org.rut.util.algorithm.support.HeapSort; IAQ<|3Q
import org.rut.util.algorithm.support.ImprovedMergeSort; (F&LN!Hn>p
import org.rut.util.algorithm.support.ImprovedQuickSort; EIRDH'[L
import org.rut.util.algorithm.support.InsertSort; b=5w>*
import org.rut.util.algorithm.support.MergeSort; e{E\YEc
import org.rut.util.algorithm.support.QuickSort; 2fTuIS<yr
import org.rut.util.algorithm.support.SelectionSort; 86=W}eV1r
import org.rut.util.algorithm.support.ShellSort; blQ&QQL
i%FC lMF
/** MDF_Xr-hZ
* @author treeroot h[>pC"s?K
* @since 2006-2-2 KA?}o^-F
* @version 1.0 86{>X5+
*/ j,i9,oF6]
public class SortUtil { pWxk^qhe/
public final static int INSERT = 1; _RaE:)
public final static int BUBBLE = 2; 32z4G =l
public final static int SELECTION = 3; u ]"fwkL
public final static int SHELL = 4; h^ Cm\V
public final static int QUICK = 5; )g'J'_Sl
public final static int IMPROVED_QUICK = 6; rn|]-^ku/
public final static int MERGE = 7; ?>B?*IK!
public final static int IMPROVED_MERGE = 8; -~]H5er`
public final static int HEAP = 9; Mc,|C)
O.+J%],
public static void sort(int[] data) { ZPH_s^
sort(data, IMPROVED_QUICK); 7Y8~")f
} <YW)8J
private static String[] name={ Z{B e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W4o8]&A
}; r.eK;
dcY(1p)
private static Sort[] impl=new Sort[]{ RHFRN&RU$
new InsertSort(), H0s*Lb
new BubbleSort(), %'1iT!g8
new SelectionSort(), KVOV<uDCj
new ShellSort(), m#UQ,EM
new QuickSort(), 2 q4p-
new ImprovedQuickSort(), 9K@I
new MergeSort(), &\9%;k
new ImprovedMergeSort(), f- XUto
new HeapSort() )7 Mss/2T
}; g!}]FQBb
r,JQR)l0@V
public static String toString(int algorithm){ /Z6lnm7wJ
return name[algorithm-1]; B/;>v
} _[R(9KyF0f
jkL=JAcf~
public static void sort(int[] data, int algorithm) { bJIYe ld
impl[algorithm-1].sort(data); q5_zsUR=
} :XhF:c[.:
I#2$CSJ
public static interface Sort { qj;i03 +@
public void sort(int[] data); Nud =K'P=
} 1\fx57a\
)YAa7\Od
public static void swap(int[] data, int i, int j) { vcFR Td
int temp = data; He=C\"
data = data[j]; J:Fq ip
data[j] = temp; qGA|.I9,
} e8<}{N0,n
} HF*0