[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; CN8Y\<Ar
} *mvlb (' &
int i1=l; t=W}SH
int i2=mid+1; E92KP?i
for(int cur=l;cur<=r;cur++){ |imM#wF
if(i1==mid+1) Q:d]imw!O
data[cur]=temp[i2++]; 0[?Xxk}s0
else if(i2>r) ?QdWrE_
data[cur]=temp[i1++]; PP33i@G
else if(temp[i1] data[cur]=temp[i1++]; @YTaSz$L
else 9 X`Sm}i
data[cur]=temp[i2++]; fN1-d&T
} LIF7/$,0
} )W _v:?A9
Iom'Y@x
} 30T)!y
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改进后的归并排序: ,uhb~N<
EaY?aAuS:
package org.rut.util.algorithm.support; ra gXn
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import org.rut.util.algorithm.SortUtil; fdi\hg^x
,w:U#r~s"
/** sLT3Y}IO
* @author treeroot !9VY|&fHe
* @since 2006-2-2 -3Z,EaG^
* @version 1.0 1JG'%8}#8
*/ L2i_X@/
public class ImprovedMergeSort implements SortUtil.Sort { ~YWQ2]
wIaony
private static final int THRESHOLD = 10; ?Z[[2\DR
j[J-f@F \Y
/* E,x+JeKV
* (non-Javadoc) 0gP}zM73
* h(u8&MHx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B Qxs~
*/ ag;pN*z
public void sort(int[] data) { jZkcBIK2
int[] temp=new int[data.length]; aP@N)"
mergeSort(data,temp,0,data.length-1); #rQ2gx4
} =ToyZm\
fW1CFRHH
private void mergeSort(int[] data, int[] temp, int l, int r) { :vQrOn18p
int i, j, k; :zke %Yx
int mid = (l + r) / 2; 5 ,B_u%bb
if (l == r) 0{p#j~ZhC
return; `*N[jm"
if ((mid - l) >= THRESHOLD) A>;bHf@
mergeSort(data, temp, l, mid); (Y?gn)*t
else .|>3k'<l
insertSort(data, l, mid - l + 1); sW'AjI
if ((r - mid) > THRESHOLD) 17"uf.G
mergeSort(data, temp, mid + 1, r); NgGp
else Y>dzR)~3[
insertSort(data, mid + 1, r - mid); W ]?G}Q;
X Dm[Gc>(~
for (i = l; i <= mid; i++) { tOd&!HYL
temp = data; -4IE]'##
} +RMSA^
for (j = 1; j <= r - mid; j++) { i0kak`x0
temp[r - j + 1] = data[j + mid]; }t=!(GOb}
} }"P|`"WW
int a = temp[l]; b)5uf'?-
int b = temp[r]; Ru!iR#s)!
for (i = l, j = r, k = l; k <= r; k++) { H0gbSd+
if (a < b) { eFTpnG
data[k] = temp[i++]; g<;q.ZylT
a = temp; yT"Eq"7/Y#
} else { '/n1IM$7
data[k] = temp[j--]; ;yLu R
b = temp[j]; l<LP&
} { VfXsI
} r|fL&dtr
} Ls$D$/:q?
_~J {wM
/** %G/hD
* @param data ^?7-r6
* @param l +-U- D?-
* @param i Rn(ec
*/ s_OF(o
private void insertSort(int[] data, int start, int len) { rv^@,8vq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n&;85IF1
} TA`1U;c{n
} ~"&|W'he[
} vkx7paY_
} JHM9
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堆排序： M4oy
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package org.rut.util.algorithm.support; "fCu=@i
y^,1a[U.
import org.rut.util.algorithm.SortUtil; t?x<g<PJ4
rq/yD,I,
/** r6MMCJ|G
* @author treeroot 3G)#5Lf<
* @since 2006-2-2 7uS~MW
* @version 1.0 0w\zLU
*/ %S@ZXf~:
public class HeapSort implements SortUtil.Sort{ \K{0L
QQ*hCyw!
/* (non-Javadoc) XSe=sHEI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6xe*E[#k\
*/ p$NQyS5C"S
public void sort(int[] data) { hOu3 bA
MaxHeap h=new MaxHeap(); .9on@S
h.init(data); z0p*Z&
for(int i=0;i h.remove(); hk(ZM#Bh
System.arraycopy(h.queue,1,data,0,data.length); <EB+1GFuI
} B:;pvW]
i&Tbz!
private static class MaxHeap{ uGf@
nzuX&bSw
void init(int[] data){ _"Dv uR
this.queue=new int[data.length+1]; 7a=gH2]&
for(int i=0;i queue[++size]=data; L%*!`TN
fixUp(size); hYT0l$Ng
} W#4 7h7M
} @;zl
w;[NH/A^a
private int size=0; _(W+S`7Z
\}u Y'F
private int[] queue; l6T-}h:=
pXT4)JDpc
public int get() { ^pAAzr"hv
return queue[1]; N ,'GN[s
} B4c]}r+
-LoZs ru
public void remove() { 8`q:Gz=M\
SortUtil.swap(queue,1,size--); 8rnwXPBN
fixDown(1); N_kMK
} 7u -p%eq2
file://fixdown Z58X5"
private void fixDown(int k) { (Ft+uuG
int j; (^8Y|:Tz
while ((j = k << 1) <= size) { ~drS} V
if (j < size %26amp;%26amp; queue[j] j++; zH?!
if (queue[k]>queue[j]) file://不用交换 jH5 k
break; l[mWf
SortUtil.swap(queue,j,k); 4C6YO
k = j; 6"LcJ%o
} U2tV4_ e
} iW]j9}t
private void fixUp(int k) { v}}F,c(f
while (k > 1) { :}L[sl\R
int j = k >> 1; ajbA\/\G;
if (queue[j]>queue[k]) 3Gp$a;g
break; '1P2$#
SortUtil.swap(queue,j,k); ?Ny9'g>?
k = j; MnsJEvn/
} 0rQMLx
} E<{R.r
.;y.]Z/;
} Z, zWuE3
#vz7y(v
} QUwd [
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SortUtil： %~O,zs.2p
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package org.rut.util.algorithm; .KB^3pOpx
2@n{yYwy
import org.rut.util.algorithm.support.BubbleSort; [`#CXq'
import org.rut.util.algorithm.support.HeapSort; KB3Htw%W[+
import org.rut.util.algorithm.support.ImprovedMergeSort; ?hZAxR\
import org.rut.util.algorithm.support.ImprovedQuickSort; pz!Zs."f)
import org.rut.util.algorithm.support.InsertSort; ^]>O;iB?
import org.rut.util.algorithm.support.MergeSort; (R[[Z,>w.
import org.rut.util.algorithm.support.QuickSort; m4[;(1
import org.rut.util.algorithm.support.SelectionSort; BA@lk+aW
import org.rut.util.algorithm.support.ShellSort; FZ{h?#2?
[SjqOTon{
/** jnkR}wAA
* @author treeroot !hA-_
* @since 2006-2-2 6+#Ydii9E
* @version 1.0 =m]v8`g
*/ 2prU
public class SortUtil { wjU9ZGM
public final static int INSERT = 1; GL>O4S<`
public final static int BUBBLE = 2; afCW(zHp
public final static int SELECTION = 3; Hck]aKI+
public final static int SHELL = 4; <O(4TO
public final static int QUICK = 5; \0^Kram>
public final static int IMPROVED_QUICK = 6; $P >
public final static int MERGE = 7; A6
public final static int IMPROVED_MERGE = 8; E+j/Cu
public final static int HEAP = 9; 3H'sHuK"X
KaLzg5is
public static void sort(int[] data) { Z\(q@3C
sort(data, IMPROVED_QUICK); z 4e7PW|
} =Pyj%4Rs
private static String[] name={ $f$SNx)),
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |QF7 uV
}; nQF(vTDN
%e8@*~h@
private static Sort[] impl=new Sort[]{ ]vB$~3||
new InsertSort(), <.%4 ! }f8
new BubbleSort(), Ij7p'a
new SelectionSort(), rP'me2 B
new ShellSort(), 0.Q Ujw
new QuickSort(), %HhBt5w
new ImprovedQuickSort(), ,5P0S0*{
new MergeSort(), [CTnXb
new ImprovedMergeSort(), '9%\;
new HeapSort() #JqB ;'\
}; xS5vbJ
K6)Gc%:`
public static String toString(int algorithm){ 6lZ3tdyNo
return name[algorithm-1]; &Gc9VF]o
} \:P>le'1
DcS+_>a\{l
public static void sort(int[] data, int algorithm) { {Ea b j
impl[algorithm-1].sort(data); xf'V{9*
} bS{bkE>
&.F4b~A7
public static interface Sort { `{8K.(])s!
public void sort(int[] data); 1;* cq
} 4XL^D~V
oe ~'o'
public static void swap(int[] data, int i, int j) { :ffY6L+
int temp = data; HRpte=`q
data = data[j]; f'F?MINJP
data[j] = temp; Q*GN`07@?d
} mwO6g~@`
} ^23~ZHu