[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; 1h@qcom9K_
} @JGmOwZ
int i1=l; 4vg3F(
int i2=mid+1; :$D*ab^^P
for(int cur=l;cur<=r;cur++){ ZO/e!yju
if(i1==mid+1) uq3pk3 )W9
data[cur]=temp[i2++]; #}#m\=0
else if(i2>r) ob>)F^.iS
data[cur]=temp[i1++]; eB~\~@
else if(temp[i1] data[cur]=temp[i1++]; .,u>WIUxj
else OQumAj
data[cur]=temp[i2++]; eu5te0{G
} KSs1EmB
} rf0Z5.
O=A R`r#u
} g}%ODa !H
;7\Fx8"s[
改进后的归并排序: h8(#\E
ZuGSRGX'
package org.rut.util.algorithm.support; KZ2[.[(Ph
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import org.rut.util.algorithm.SortUtil; d[t0K]
1"y!wsM%
/** "=a3"/u
* @author treeroot ^8&}Nk[j
* @since 2006-2-2 UC+Qn
* @version 1.0 65aYH4"
*/ d>f;N+O%
public class ImprovedMergeSort implements SortUtil.Sort { c~U0&V_`j
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private static final int THRESHOLD = 10; 0$|VkMq(
LtB5;ByeQ0
/* ?d%)R*3IX
* (non-Javadoc) |!(8c>]Bo
* l`\L@~ln
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d.f0OhQ
*/ \~#\ [r_
public void sort(int[] data) { "]"0d[d
int[] temp=new int[data.length]; M!6Fnj
mergeSort(data,temp,0,data.length-1); VVQ~;{L
} Fizrsr 6%
bkJ bnW=
private void mergeSort(int[] data, int[] temp, int l, int r) { k5< n:dS
int i, j, k; -o+t&m
int mid = (l + r) / 2; r $S9/
if (l == r) 2xN7lfu1RB
return; uL)MbM]
if ((mid - l) >= THRESHOLD) 1te^dh:Vp
mergeSort(data, temp, l, mid); 7=fM}sk
else "\*)KH`C
insertSort(data, l, mid - l + 1); a>GA=r
if ((r - mid) > THRESHOLD) )#AYb
mergeSort(data, temp, mid + 1, r); wwl,F=| Y
else u[qy1M0
insertSort(data, mid + 1, r - mid); U,2OofLM
3@=<4$
for (i = l; i <= mid; i++) { }!^h2)'7
temp = data; W $D 34(
} +(Y\w^@%H
for (j = 1; j <= r - mid; j++) { \y7?w*K
temp[r - j + 1] = data[j + mid]; \!-]$&,j4
} W_XFTqp^
int a = temp[l]; (m1m}* @
int b = temp[r]; wA{)9.
for (i = l, j = r, k = l; k <= r; k++) { 1tXc7NA<
if (a < b) { d*+}_EV)Y3
data[k] = temp[i++]; "dCIg{j
a = temp; b!g)/%C
} else { Wqv7
data[k] = temp[j--]; t'F$/mx.
b = temp[j]; >IQ&*Bb
} +_:p8, 5o
} |!K&h(J|
} |6NvByc,
:vi %7
/** ]/!*^;cY(
* @param data L^e*_q2d:>
* @param l 2>"{El|PbN
* @param i HV!P]82Pa
*/ Jha*BaD~N
private void insertSort(int[] data, int start, int len) { U+VJiz<!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <@`K^g;W
} ~6#mVP5sU)
} s;h`n$
} S*}GW-)oA
} =3,<(F5Y[
cY} jPDH
堆排序： t>]W+Lx#
5 n4/}s
package org.rut.util.algorithm.support; 07^.Z[(pCt
M(8xwo-W
import org.rut.util.algorithm.SortUtil; l&Q@+xb>
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/** R@WW@ Of
* @author treeroot /,7#%D
* @since 2006-2-2 *Iw19o-I
* @version 1.0 Q\X_JZ
*/ ])pX)(a
public class HeapSort implements SortUtil.Sort{ R&s/s`pLW
Jur$O,u40l
/* (non-Javadoc) 0D:uM$ i]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @uC-dXA"
*/ 3znhpHO)
public void sort(int[] data) { RGV{KL
MaxHeap h=new MaxHeap(); N+SA$wG
h.init(data); P9\y~W
for(int i=0;i h.remove(); qjfv9sU
System.arraycopy(h.queue,1,data,0,data.length); ^ &KH|qRrO
} y3*IF2G
fo}@B&=4
private static class MaxHeap{ N0fE*xo
ed,+Slg
void init(int[] data){ ,,XHw;{
this.queue=new int[data.length+1]; w;VUP@Wm
for(int i=0;i queue[++size]=data; m";8 nm
fixUp(size); ~l+~MB
} 0T3r#zQ
} >&<D.lx
,_,7cor
private int size=0; zh !/24p9
JmF`5
private int[] queue; J!rZskd
-'W:P'BG
public int get() { P)TeF1~T
return queue[1]; ?fs#K;w
} #tPy0QH
kH=~2rwm
public void remove() { [u3^R]
SortUtil.swap(queue,1,size--); UIQ=b;J9
fixDown(1); tORDtMM9+
} ,v| vgt
file://fixdown jP@t!=
private void fixDown(int k) { n O}x,sG2'
int j; e ]>{?Z
while ((j = k << 1) <= size) { 8/34{2048
if (j < size %26amp;%26amp; queue[j] j++; nDC5/xB
if (queue[k]>queue[j]) file://不用交换 qmnCa&C9
break; RDG,f/L2
SortUtil.swap(queue,j,k); I@a7!ugU65
k = j; XeBSHvO_
} /=OSGIJzm
} b!37:V\#}
private void fixUp(int k) { X>jwjRK $
while (k > 1) { q33!X!br
int j = k >> 1; 6a`_i
if (queue[j]>queue[k]) kLY9#p=X
break; 4d'tK^X
SortUtil.swap(queue,j,k); m4P=,=%
k = j; j1toV$)P
} 1/qiE{NW
} [laX~(ND{
**YNR:#Y
} RZE:WE;5
PZA;10z
} $j}sxxTT
e$(i!G)
SortUtil： 7 -V_)FK2c
f4T-=` SO
package org.rut.util.algorithm; ?Ve5}N
J=]w$e ?.P
import org.rut.util.algorithm.support.BubbleSort; Zr2QeLQC(
import org.rut.util.algorithm.support.HeapSort; FkECY
import org.rut.util.algorithm.support.ImprovedMergeSort; >|I3h5\M
import org.rut.util.algorithm.support.ImprovedQuickSort; ;/{Q4X{
import org.rut.util.algorithm.support.InsertSort; I0jEhg%JZ
import org.rut.util.algorithm.support.MergeSort; Iei4yDv ;
import org.rut.util.algorithm.support.QuickSort; J&:0ytG
import org.rut.util.algorithm.support.SelectionSort; +TX p;6pA
import org.rut.util.algorithm.support.ShellSort; !xqG-rd '
_5YL !v&
/** R QO{fC
* @author treeroot <db/. A3
* @since 2006-2-2 t_VHw'~"
* @version 1.0 :* /``
*/ C1rCKKh
public class SortUtil { d`nS0Tf'
public final static int INSERT = 1; r@<;
public final static int BUBBLE = 2; R;V(D3
public final static int SELECTION = 3; 5BCaE)J
public final static int SHELL = 4; 'Jl.fN
public final static int QUICK = 5; s3kEux^
public final static int IMPROVED_QUICK = 6; gZ!(&u
public final static int MERGE = 7; x!.VWGtb
public final static int IMPROVED_MERGE = 8; x}>tX
public final static int HEAP = 9; u!`C:C'
]R>k0X.V
public static void sort(int[] data) { b~1p.J4
sort(data, IMPROVED_QUICK); YL=k&QG
} gS|xicq!
private static String[] name={ }EIwkz8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )LhO}zQ
}; =<_5gR
1k%ko?
private static Sort[] impl=new Sort[]{ &{=~)>h
new InsertSort(), 0j/81Y}p
new BubbleSort(), xNqQbkF
new SelectionSort(), G =4y!y
new ShellSort(), B# H
new QuickSort(), IFTW,9hh
new ImprovedQuickSort(), YXg uw7%\
new MergeSort(), M2EN(Y_k0
new ImprovedMergeSort(), ?Ru`ma\;
new HeapSort() ^{K8uN7
}; qL+y8*
I!<v$
public static String toString(int algorithm){ Qy/bzO
return name[algorithm-1]; c_a$g
} +l/j6)O`(m
S'JeA>L
public static void sort(int[] data, int algorithm) { ipp_?5TL
impl[algorithm-1].sort(data); KE3 /<0Z
} yl ;'Ru:
,"VQ0Z1
public static interface Sort { q |^O
public void sort(int[] data); 0amz#VIB<u
} @YB\PVhW
+e:ZN tr9
public static void swap(int[] data, int i, int j) { 2!3&Ub#FO
int temp = data; q5W'P>
data = data[j]; PC_4#6^5
data[j] = temp; &"h!SkX/
} ,< icW&a
} uWInx6p