[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; Vfp{7I$#6"
} u7fae$:&
int i1=l; y .S0^
int i2=mid+1; A2uSH@4
for(int cur=l;cur<=r;cur++){ XV)ej>A-V
if(i1==mid+1) t3 *2Z u
data[cur]=temp[i2++]; d4[M{LSl
else if(i2>r) 0Apdhwk~
data[cur]=temp[i1++]; @pYAqX2
else if(temp[i1] data[cur]=temp[i1++]; )#T(2A
else ]&yO>\MgJB
data[cur]=temp[i2++]; Mmbb}(<
} SYB } e
} %#02Z%?%
bU=!~W5
} -'&MT :L
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改进后的归并排序: kE,~NG9P
qUx!-DMY
package org.rut.util.algorithm.support; ep3_G\m
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import org.rut.util.algorithm.SortUtil; joAR;J
wz9V)_V*
/** sJ7r9O`x
* @author treeroot YQ4;X8I`r
* @since 2006-2-2 xRP#}i:m
* @version 1.0 9,82Uta
*/ ??aOr*%
public class ImprovedMergeSort implements SortUtil.Sort { <QugV3e
!a~>;+
private static final int THRESHOLD = 10; d'kQE_y2.
tu6c!o,@
/* z++*,2F
* (non-Javadoc) . CLiv
* C:_!zY'z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @&S4j]rq
*/ r=s,Ath
public void sort(int[] data) { oA"t`,3
int[] temp=new int[data.length]; 4NQS'*%D
mergeSort(data,temp,0,data.length-1); E4HG`_cWb
} u\ytiGO*
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private void mergeSort(int[] data, int[] temp, int l, int r) { 5X|=qZ
int i, j, k; I^[R]Js
int mid = (l + r) / 2; /o.wCy,J<
if (l == r) E[Tz%x=P
return; Z%N{Y x(
if ((mid - l) >= THRESHOLD) G!8O*4+A
mergeSort(data, temp, l, mid); IpoZ6DB$
else |Ag~k? QC
insertSort(data, l, mid - l + 1); 7sC$hm]
if ((r - mid) > THRESHOLD) &rorBD 5aj
mergeSort(data, temp, mid + 1, r); be$wGO=Ts
else E3_e~yu&
insertSort(data, mid + 1, r - mid); 6*S|$lo9B
^uMy|d
for (i = l; i <= mid; i++) { 9vmH$
temp = data; xFHc+m' m~
} ;f^.7|
for (j = 1; j <= r - mid; j++) { I/Hwf
temp[r - j + 1] = data[j + mid]; O!hg@[\B+
} p` B48TW
int a = temp[l]; 'vhgR2/
int b = temp[r]; |UZ#2
for (i = l, j = r, k = l; k <= r; k++) { ]B:g<}5$4
if (a < b) { p;"pTGoWi
data[k] = temp[i++]; R4_4FEo
a = temp; w-AF5%gX
} else { ?2 u_E "
data[k] = temp[j--]; Gz+Bk5#{
b = temp[j]; z(:0@5
} zn_InxR
} %njX'7^u
} uPsn~>(4
a/NmM)
/** DCPK1ql
* @param data S3MMyS8
* @param l G{knO?BK
* @param i 3:PBVt=
*/ iJZqAfG{m?
private void insertSort(int[] data, int start, int len) { ZQD_w#0j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }wC pr.@
} T3@wNAAU
} $`i$/FE
} b~Y$!fc
} fk5!/>X
R KFz6t
堆排序： % rRYT8
m_W\jz??k
package org.rut.util.algorithm.support; ipQJn_:2
wlAlIvIT
import org.rut.util.algorithm.SortUtil; 8%_XJyg
[kt!\-
/** 9Y&n$svB
* @author treeroot fv5'Bl
* @since 2006-2-2 w+=>b
* @version 1.0 rG:IS=
*/ *%:p01&+
public class HeapSort implements SortUtil.Sort{ ZC_b`q<
c;xL.
/* (non-Javadoc) d}EGI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z;zyk
*/ 1U;je,)
public void sort(int[] data) { |[>`3p"&
MaxHeap h=new MaxHeap(); |n \HxU3
h.init(data); (8?t0}#t
for(int i=0;i h.remove(); W|NzdxCY
System.arraycopy(h.queue,1,data,0,data.length); X)e6Y{vO
} N0O8to}V
6;dQ#wmg
private static class MaxHeap{ $LRvPan`
-w1U/o.
void init(int[] data){ _UT>,c;h
this.queue=new int[data.length+1]; Dq)V] Zx
for(int i=0;i queue[++size]=data; UAFl+d!
fixUp(size); vd|PTHV_
} R61.!ql%w
} ctTg-J2.
V()s!w
private int size=0; <*V%!pwIG
yH;=Y1([
private int[] queue; ``nuw7\C:
x>A(016:C
public int get() { /1zi(z
return queue[1]; }N]|zCEj
} R3TdQ6j
7Y&W^]UZ0t
public void remove() { r,(rWptf4
SortUtil.swap(queue,1,size--); T\:Vu{|
fixDown(1); rZLTai}`>
} |_&vW\
file://fixdown KqG:o+V=
private void fixDown(int k) { J/>Y mi,
int j; =5l7{i*`
while ((j = k << 1) <= size) { :;cKns0OA
if (j < size %26amp;%26amp; queue[j] j++; = 7d{lK
if (queue[k]>queue[j]) file://不用交换 "a6[FqTs
break; \sEq r)\k
SortUtil.swap(queue,j,k); SQDllG84E
k = j; 3V?JX5X\
} ]{jdar^
} 1\z5[ _
private void fixUp(int k) { 1.+0=M[h
while (k > 1) { 3lcd:=
int j = k >> 1; Z `sM(?m
if (queue[j]>queue[k]) \hai
break; 8~YhT]R=
SortUtil.swap(queue,j,k); a[Ah
k = j; vR.=o*!%
} fW~r%u .y
} 4:.yE|@h[
{u{n b3/jl
} U$Z)v1&{
mHrt)0\_
} KhIg
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SortUtil： ;{[&&qMwU
wHq*)7#h#
package org.rut.util.algorithm; >B<jR$`6@
W&#Ps6)8
import org.rut.util.algorithm.support.BubbleSort; pUutI|mt/
import org.rut.util.algorithm.support.HeapSort; g VX
import org.rut.util.algorithm.support.ImprovedMergeSort; y!&6"l$K]
import org.rut.util.algorithm.support.ImprovedQuickSort; &<2~7?$!
import org.rut.util.algorithm.support.InsertSort; lQj3#!1}
import org.rut.util.algorithm.support.MergeSort; R*VRxQ,h6+
import org.rut.util.algorithm.support.QuickSort; 87l(a,#J
import org.rut.util.algorithm.support.SelectionSort; 62TWqQ!9d
import org.rut.util.algorithm.support.ShellSort; kG@~;*;l
9dn~nnd'n
/** Jz(wXp
* @author treeroot btoye \rl
* @since 2006-2-2 {&nL'R
* @version 1.0 uDvZ]Q|.
*/ ~,3+]ts='\
public class SortUtil { o *)>aw
public final static int INSERT = 1; L}5nq@Uu)
public final static int BUBBLE = 2; .xo#rt9_"=
public final static int SELECTION = 3; LfOXgn\
public final static int SHELL = 4; !LB#K?I
public final static int QUICK = 5; ;)].Dj9
public final static int IMPROVED_QUICK = 6; G`8i{3:
public final static int MERGE = 7; m%hI@'
public final static int IMPROVED_MERGE = 8; d#xi_L!
public final static int HEAP = 9; _Cn[|E
luXcr H+w
public static void sort(int[] data) { 0`VA}c
sort(data, IMPROVED_QUICK); Mhp6,JL
} 3]"RaI4Q0
private static String[] name={ V<:scLm#OF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wXI6KN-
}; $L%gQkz_
t1"-3afe
private static Sort[] impl=new Sort[]{ cc`+rD5I-
new InsertSort(), V_+XZ+7Lx}
new BubbleSort(), }GI8p* ]o=
new SelectionSort(), -7{qTe{
new ShellSort(), 9>?3FMKdY
new QuickSort(), )RV.N}NU
new ImprovedQuickSort(), <*k]Aa3y
new MergeSort(), uU_lC5A|
new ImprovedMergeSort(), ;%wQnhg
new HeapSort() 6+`+$s0
}; _=l8e-6r
3"afrA
public static String toString(int algorithm){ d h5%
return name[algorithm-1]; /`$9H|
} C]H'z
o+Cd\D69S
public static void sort(int[] data, int algorithm) { W Cz+
impl[algorithm-1].sort(data); ip.aM#
} ${fJ]
En-BT0o
public static interface Sort { (Klvctoy
public void sort(int[] data); =, kH(rp2
} >wx1M1
f4{O~?=
public static void swap(int[] data, int i, int j) { <E/"v
int temp = data; wP:ab
data = data[j]; yvN;|R
data[j] = temp; gLp7<gx6
} vu7F>{D
} .$&_fUY