[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; QM24cm T
} 5\Rg%Ezl
int i1=l; pr[V*C/
int i2=mid+1; DYF(O-hJK
for(int cur=l;cur<=r;cur++){ t*J?#r
if(i1==mid+1) j>?`N^
data[cur]=temp[i2++]; <@$+uZt+
else if(i2>r) u2S8DuJ
data[cur]=temp[i1++]; p}Um+I=1
else if(temp[i1] data[cur]=temp[i1++]; lA`qB1x
else e'sS",o*
data[cur]=temp[i2++]; i#aKW'
} 8!{ }WLwb
} ~d3|zlh
IF cre
} )KY4BBc
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改进后的归并排序: EbeSl+iMx_
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package org.rut.util.algorithm.support; nvCp-Z$
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import org.rut.util.algorithm.SortUtil; J|F!$m{
?OPuv5!pI
/** H.;2o(vD
* @author treeroot kCALJRf~d
* @since 2006-2-2 Y>T<Qn^D
* @version 1.0 CkRilS<
*/ icQQLSU5
public class ImprovedMergeSort implements SortUtil.Sort { Nt;1&dwUb
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private static final int THRESHOLD = 10; dlA0&;}z
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/* _kc}:
* (non-Javadoc) JAM]neKiX
* ,rjl|F* T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a)*(**e$*i
*/ k(M"k!M
public void sort(int[] data) { j]U~ZAn,K
int[] temp=new int[data.length]; W7c B
mergeSort(data,temp,0,data.length-1); #Cx#U"~G`
} oJ tmd}
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private void mergeSort(int[] data, int[] temp, int l, int r) { .mNw^>:cq
int i, j, k; Z&4L///
int mid = (l + r) / 2; ^oYRBEIJH
if (l == r) A<^X P-Nrp
return; @r^s70{}
if ((mid - l) >= THRESHOLD) P @J)S ?
mergeSort(data, temp, l, mid); Fn0|v66
else Ct^=j@g
insertSort(data, l, mid - l + 1); 7|yEf
if ((r - mid) > THRESHOLD) 7[mP@ {
mergeSort(data, temp, mid + 1, r); U%0|LQk5
else F vTswM>
insertSort(data, mid + 1, r - mid); yVQW|D0,j
>5E1y!
for (i = l; i <= mid; i++) { H )>3c1
temp = data; .2U3_1dX
} vL;>A]oM2
for (j = 1; j <= r - mid; j++) { $E!f@L
temp[r - j + 1] = data[j + mid]; PJ=|g7I
} *&I _fAh]
int a = temp[l]; D+jE{v'
int b = temp[r]; ei>iXDt
for (i = l, j = r, k = l; k <= r; k++) { NcHU)
if (a < b) { YNl".c
data[k] = temp[i++]; >JA>np
a = temp; cq5^7.
} else { '? -N
data[k] = temp[j--]; Z4:^#98c.
b = temp[j]; Y DW^N]G
} >|`1aCg,
} 8GRB6-.h
} <CJy3<$u
86 9sS
/** MIyT9",Pl
* @param data :xTm-L
* @param l , Y,^vzX6
* @param i GY %$7
*/ c<lEFk!g
private void insertSort(int[] data, int start, int len) { .XkD2~;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >y,. `ECn
} W8Wjq DQ
} Y@<jvH1
} _>aP5g?Ep
} SSbx[<E3
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堆排序： uL@%M8n
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package org.rut.util.algorithm.support; ,t;US.s([.
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import org.rut.util.algorithm.SortUtil; _yX.Apv]
+S+=lu _
/** |H]0pbC)w
* @author treeroot S{v]B_N[M
* @since 2006-2-2 %C@p4
* @version 1.0 -"{g kjuv
*/ ?Z4%u8Krvz
public class HeapSort implements SortUtil.Sort{ k.jBu
s? Xgo&rS_
/* (non-Javadoc) hSXJDT2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9[W >`JKo
*/ sekei6#fi
public void sort(int[] data) { l!KPgRw
MaxHeap h=new MaxHeap(); =F Y2O`%a
h.init(data); ms!|a_H7r
for(int i=0;i h.remove(); D%LYQ
System.arraycopy(h.queue,1,data,0,data.length); {]Cn@.TPD
} hF5T9^8
%3|/t-US
private static class MaxHeap{ .p*?g;
@$ju Qm
void init(int[] data){ ?E(X>tH
this.queue=new int[data.length+1]; `u R`O9)e
for(int i=0;i queue[++size]=data; ,c0LRO
fixUp(size); KZ%us6
} g]c6_DMfb1
} 6$f\#TR
g oyQ',+
private int size=0; kM1N4N7
$+ N~Fa
private int[] queue; ^c>Bh[
I}5e{jBB
public int get() { km][QEXs%
return queue[1]; ggitUQ+t;G
} "vQ%` Q
rlawH}1b
public void remove() { &l!T2PX!
SortUtil.swap(queue,1,size--); c#`IF6qj
fixDown(1); arRU`6?
} R".$x{{
file://fixdown ,!GoFu
private void fixDown(int k) { ='=4tj=z
int j; 3&5b!Y
while ((j = k << 1) <= size) { ?G!~&
if (j < size %26amp;%26amp; queue[j] j++; Iz'Et'w8!
if (queue[k]>queue[j]) file://不用交换 2/tx5Nc
break; 'Ha> >2M
SortUtil.swap(queue,j,k); oyY z3X
k = j; >SLmlK
} Xdl dUK[
} GUqG1u z9
private void fixUp(int k) { zK1]o-wSAT
while (k > 1) { ~e]B[>PT
int j = k >> 1; 98O]tL+k/u
if (queue[j]>queue[k]) f-|zh#L
break; fA?v\'Qq/
SortUtil.swap(queue,j,k); ,bIJW]h0
k = j; Iz j-,a
} HS ]c~
} _x3=i\O,
WiB~sIp
} |HYST`
V=th-o3[
} mvc ;.+
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SortUtil： TF5jTpGq
OI"g-+~
package org.rut.util.algorithm; d=8.cQL:E
s3yGL
import org.rut.util.algorithm.support.BubbleSort; &Xh>w(u
import org.rut.util.algorithm.support.HeapSort; {X{S[(|
import org.rut.util.algorithm.support.ImprovedMergeSort; %eW7AO>
import org.rut.util.algorithm.support.ImprovedQuickSort; r\F2X J^
import org.rut.util.algorithm.support.InsertSort; c2,g%(
import org.rut.util.algorithm.support.MergeSort; XzX2V">(%
import org.rut.util.algorithm.support.QuickSort; :@"o.8p
import org.rut.util.algorithm.support.SelectionSort; _G@Zn[v
import org.rut.util.algorithm.support.ShellSort; s3nt2$=:t
<uJ {>~
/** o@_i&4[MW
* @author treeroot IDD`N{EA
* @since 2006-2-2 S5, u| H
* @version 1.0 D.%%D%AdB
*/ 83 R_8
public class SortUtil { 1#7|au%:)
public final static int INSERT = 1; OHj>ufwVq
public final static int BUBBLE = 2; $'_Q@ZBq
public final static int SELECTION = 3; 9&Un|cr
public final static int SHELL = 4; Mp!1xx
public final static int QUICK = 5; /wJ4hHY
public final static int IMPROVED_QUICK = 6; $gz8! f?
public final static int MERGE = 7; y7CO%SA
public final static int IMPROVED_MERGE = 8; |6DJ5VFzD
public final static int HEAP = 9; (Cq 38~mR
+/eJ#Xw3u8
public static void sort(int[] data) { X[H.t$w5A
sort(data, IMPROVED_QUICK); L;?F^RK{U
} dTCLE t.
private static String[] name={ }vx,i99W?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8IWT;%
}; );}M"W8
-!qjBK,`X
private static Sort[] impl=new Sort[]{ 9xq3>(
new InsertSort(), F%&lM[N%
new BubbleSort(), ub9[!}r't
new SelectionSort(), GHn0(o&K
new ShellSort(), 9+@z:j
new QuickSort(), ^c(r4#}$"
new ImprovedQuickSort(), &\~*%:C
new MergeSort(), Z:>3AJuS_
new ImprovedMergeSort(), Gf9sexn]l
new HeapSort() z;e@m2.IM
}; -AD`(b7q
`$FX%p
public static String toString(int algorithm){ zjcSn7iu
return name[algorithm-1]; sb3z8:r
} y(22m+B
,X:3w3nr^
public static void sort(int[] data, int algorithm) { wme#8/eUk
impl[algorithm-1].sort(data); LEtGrA/%@b
} N}NKQ]=
/ar0K9`c
public static interface Sort { 66 R=
public void sort(int[] data); {dxl8~/I
} 7G;1n0m-T
rr\u)D#)
public static void swap(int[] data, int i, int j) { fJ5mKN
int temp = data; \?Z7|
data = data[j]; ):Z#!O<
data[j] = temp; LJb=9tp~
} KaOXqFT=
} _unoDoB