[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; |*Of^IkG0
} mJSK; @w<O
int i1=l; =DGn,i9
int i2=mid+1; 44Q6vb?
for(int cur=l;cur<=r;cur++){ '" ^ B&W
if(i1==mid+1) qPL^zM+
data[cur]=temp[i2++]; r9+E'\
else if(i2>r) H&~5sEGa
data[cur]=temp[i1++]; B>{|'z?%>
else if(temp[i1] data[cur]=temp[i1++]; FLVbkW-G.
else @][ a8:Y9I
data[cur]=temp[i2++]; "xL;(Fqu
} lv=yz\
} X!HDj<
I/oIcQS!k
} ~8XX3+]z:X
NG!>7$@RV
改进后的归并排序: 14mXx}O
/#:Rd^
package org.rut.util.algorithm.support; R.91v4J
cxAViWsf
import org.rut.util.algorithm.SortUtil; $o/0A
~gSwxGT7d
/** i<B:
* @author treeroot Vf"O/o}hq,
* @since 2006-2-2 x{=[w`
* @version 1.0 LDT'FwMjy
*/ z0\;m{TH
public class ImprovedMergeSort implements SortUtil.Sort { Y1#-^,qg
ZMdM_i?
private static final int THRESHOLD = 10; oq=?i%'>
9`)w@-~~
/* .jvSAV5B
* (non-Javadoc) 3'?h;`v\Lo
* 2N L:\%wz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cf.pTYSl
*/ l*F!~J3
public void sort(int[] data) { = 4BLc
int[] temp=new int[data.length]; 73&]En
mergeSort(data,temp,0,data.length-1); 6V.awg,
} MV Hz$hyB
y%{*uH}SL
private void mergeSort(int[] data, int[] temp, int l, int r) { _F}IF9{?G
int i, j, k; S4#A#a2J
int mid = (l + r) / 2; N>uA|<b,
if (l == r) 3I'M6WA
return; l9M#]*{
if ((mid - l) >= THRESHOLD) 4RK.Il*d
mergeSort(data, temp, l, mid); Bpk@{E9
else >k$[hk*~
insertSort(data, l, mid - l + 1); XR{5]lKt_
if ((r - mid) > THRESHOLD) NmH}"ndv+
mergeSort(data, temp, mid + 1, r); }9L 40)8
else Y{%4F%Oy
insertSort(data, mid + 1, r - mid); )ZS:gD
K*([9VZ
for (i = l; i <= mid; i++) { _7-"VoX
temp = data; WHlD%u
} |#DC.Ga!
for (j = 1; j <= r - mid; j++) { O!#L#u53
temp[r - j + 1] = data[j + mid]; \SYPu,ZT
} <7vIh0
int a = temp[l]; ",MK'\E
int b = temp[r]; I><99cwFI
for (i = l, j = r, k = l; k <= r; k++) { xTa4.ZXg
if (a < b) { b5iIV1g
data[k] = temp[i++]; hN>('S-cq
a = temp; JxX jDYrU
} else { 0C7thl{Dms
data[k] = temp[j--]; *Gk<"pEeS
b = temp[j]; 3Ew"[FUs
} DiZ!c"$
} 5@w'_#!)
} <Z\MZ&{k{*
xm<5S;E5U4
/** "-0pz\a
* @param data jw`&Np2Q
* @param l pl jV|.?
* @param i {u(}ED#p
*/ K B`1%=
private void insertSort(int[] data, int start, int len) { (&9DB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~ERRp3Ee?
} m~= ]^e
} cc2d/<:
} ?`vM#)
} t7U,AQ=;P5
4=?Ok":8
堆排序： >K_$[qP3
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package org.rut.util.algorithm.support; Ev$-PX
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import org.rut.util.algorithm.SortUtil; "6`)vgI~
wu&|~@_s@
/** b6LC$"t0
* @author treeroot C:tSCNH[
* @since 2006-2-2 [I+)Ak5
* @version 1.0 H#1*'e>
*/ Ux%\Y.PPI
public class HeapSort implements SortUtil.Sort{ !#@4xeBPo
1cHSgpoJ
/* (non-Javadoc) 3/A[LL|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6k@%+<1
*/ W(u6J#2
public void sort(int[] data) { ZbZAx:L
MaxHeap h=new MaxHeap(); +(I`@5
h.init(data); %#S"~)
for(int i=0;i h.remove(); r|JiGj^om
System.arraycopy(h.queue,1,data,0,data.length); ?c=R"Yg$
} rvwl
Ab^>z
private static class MaxHeap{ *6sJ*lh
ch)Ps2i
void init(int[] data){ C]\^B6l<
this.queue=new int[data.length+1]; *oX
for(int i=0;i queue[++size]=data; Up/eV}C
fixUp(size); RAD4q"}k
} #o;CmB
} q[y,J
s0`|G|.}
private int size=0; !SO$k%b}!
j &0fC!k
private int[] queue; 9d,]_l.sB
m>Z\ rqOK
public int get() { Ul$X%
return queue[1]; ig.6[5a\
} .^)C:XiW
LAK-!!0X
public void remove() { !"Oj$c -
SortUtil.swap(queue,1,size--); ^?K?\
fixDown(1); 2d>d(^
} ERX|cc
file://fixdown !5E%W[
private void fixDown(int k) { XW&8T"q7
int j; =7J|KoKK
while ((j = k << 1) <= size) { :C|>y4U&(s
if (j < size %26amp;%26amp; queue[j] j++; g'}`FvADi
if (queue[k]>queue[j]) file://不用交换 @T,H.#bL
break; 7fN&Q~.
SortUtil.swap(queue,j,k); #g-*n@ 1
k = j; L?D~~Jb
} cvs"WX3
} X#Dhk6
private void fixUp(int k) { y-)+I<M
while (k > 1) { z!1/_]WJ,
int j = k >> 1; E-tNB{r@
if (queue[j]>queue[k]) ~*cY& 9
break; ]UCk_zWsn1
SortUtil.swap(queue,j,k); ik1L
k = j; R.2KYhp,
} rmg";(I
} k^dCX+
?{.b9`
} 8x^H<y=O
%)6:eIS
} zfr(dQ
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SortUtil： r"u(!~R
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package org.rut.util.algorithm; %:be{Y6
RZ/+K=
import org.rut.util.algorithm.support.BubbleSort; Og;$P'U
import org.rut.util.algorithm.support.HeapSort; C5sN[
import org.rut.util.algorithm.support.ImprovedMergeSort; '+q'H
import org.rut.util.algorithm.support.ImprovedQuickSort; sw qky5_K
import org.rut.util.algorithm.support.InsertSort; E/L?D
import org.rut.util.algorithm.support.MergeSort; P=SxiXsr$
import org.rut.util.algorithm.support.QuickSort; 9a~BAH,j
import org.rut.util.algorithm.support.SelectionSort; 6ImV5^l
import org.rut.util.algorithm.support.ShellSort; &;@b&p+
X!MfJ^)q
/** Xv5Ev@T
* @author treeroot Y(I*%=:$
* @since 2006-2-2 |H+k?C-w
* @version 1.0 /P8eI3R
*/ G$x["
public class SortUtil { 4}_w4@(
public final static int INSERT = 1; H'= i
public final static int BUBBLE = 2; xU\:Vid+A
public final static int SELECTION = 3; 1O3<%T#LOZ
public final static int SHELL = 4; c;|&>Fp
public final static int QUICK = 5; pqQdr-aR=
public final static int IMPROVED_QUICK = 6; <>*''^
public final static int MERGE = 7; l&^[cR
public final static int IMPROVED_MERGE = 8; _7j/[
public final static int HEAP = 9; 4Utx 9^
c;~Llj P
public static void sort(int[] data) { CO%O<_C
sort(data, IMPROVED_QUICK); &A5[C{x
} Jn:GA@[I
private static String[] name={ a+a%}76N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >A'!T'"~
}; : .w'gU_
]kplb0`
private static Sort[] impl=new Sort[]{ 4;c_%=cU
new InsertSort(), S5pP"&I[
new BubbleSort(), u,SX`6%
new SelectionSort(), 8DS5<
new ShellSort(), knK=ENf;e
new QuickSort(), ;'18
new ImprovedQuickSort(), 1\608~ZH
new MergeSort(), vVN[bD<
new ImprovedMergeSort(), "6NNId|Y
new HeapSort() M"$RtS|h
}; {u=\-|t
Mn\B\
public static String toString(int algorithm){ 7E6?)bgh
return name[algorithm-1]; R?9Plzt5
} ohtn^o;C}
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public static void sort(int[] data, int algorithm) { kFa?q}47
impl[algorithm-1].sort(data); eNC5' Z
} Jp*AIj
VU'l~%ql
public static interface Sort { JK8@J9(#
public void sort(int[] data); ?>\]%$5o
} <ZvPtW
BLH3$*,H
public static void swap(int[] data, int i, int j) { ,l?76g
int temp = data; fUWm7>6VA>
data = data[j]; 0?L$)T-B
data[j] = temp; S| -{wC%
} w>q_8V_K
} ]aW.b_7<9