[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; s j{i
} KZ;Q71
int i1=l; ]K(>r#'nH
int i2=mid+1; *Af:^>mh
for(int cur=l;cur<=r;cur++){ [exIK
if(i1==mid+1) TwZASn]o
data[cur]=temp[i2++]; K}p!W"!o
else if(i2>r) W4~:3Sk
data[cur]=temp[i1++]; Ot#O];3
else if(temp[i1] data[cur]=temp[i1++]; iI(7{$y
else :RE.md
data[cur]=temp[i2++]; ypK1 sw
} ApxGrCu
} lYq4f|5H}m
s9'lw'
} }+4^ZbX+:
<Fa]k'<^)
改进后的归并排序: 1EvK\
E Z}c8b
package org.rut.util.algorithm.support; %t:pG}A>:C
\KJ\>2Y
import org.rut.util.algorithm.SortUtil; 3A(sT}
}+1Y>W7q
/** Eu^?e
* @author treeroot U,wJ8
* @since 2006-2-2 ufekhj
* @version 1.0 7jL3mI;n%;
*/ 3j iSvrfI
public class ImprovedMergeSort implements SortUtil.Sort { ]d|:&h
bEJz>oyW"
private static final int THRESHOLD = 10; uYv"5U]MFv
l].Gz`L
/* toCxY+"nbU
* (non-Javadoc) QXcSDJ
* Gcseq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :"4Pr/}rT
*/ c{dge/2yb
public void sort(int[] data) { |*+f N8
int[] temp=new int[data.length]; _z$lg]q
mergeSort(data,temp,0,data.length-1); sm~{fg
} ~;*SW[4
(!@ Q\P
private void mergeSort(int[] data, int[] temp, int l, int r) { mu?6Phj
int i, j, k; boJ
int mid = (l + r) / 2; &(]@L\A
if (l == r) 1dy>a=W
return; 9$u'2TV
if ((mid - l) >= THRESHOLD) g5 J[ut
mergeSort(data, temp, l, mid); z"@yE*6
else !5;A.f
insertSort(data, l, mid - l + 1); jeM/8~^4-
if ((r - mid) > THRESHOLD) [8o!X)
mergeSort(data, temp, mid + 1, r); t)*MLg<C
else R\B-cU[,
insertSort(data, mid + 1, r - mid); nf7l}^/UE
eXqS9`zKr
for (i = l; i <= mid; i++) { JQhw>H9&
temp = data; :q xd])-
} Xo{|m[,
for (j = 1; j <= r - mid; j++) { Gs% cod
temp[r - j + 1] = data[j + mid]; q@}eYQ=P|e
} !e}LB%zf
int a = temp[l]; .1[[Y}
int b = temp[r]; &GC`4!H
for (i = l, j = r, k = l; k <= r; k++) { dvAvG.;U
if (a < b) { wK_I"
data[k] = temp[i++]; cnUYhxE+s
a = temp; FM)Es&p&
} else { YB^[HE\#y
data[k] = temp[j--]; gdu8O!9)
b = temp[j]; TfYXF`d
} [=63xPxs.
} }T}9AQ}|
} <9]9;
8KQ]3Z9p
/** >0W:snNK
* @param data o<hT/ P
* @param l u7oHqo`
* @param i dsx'l0q 'i
*/ VZ`L-P$AF
private void insertSort(int[] data, int start, int len) { I?l%RdGW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [q/tKdo@
} \Qh{uk[
} x>?jfN,e
} >>**n9\q
} f#s /Ycp+
39|4)1e
堆排序： -\b$5oa(
|]dA`e&y
package org.rut.util.algorithm.support; x2|YrkGv
:3z`+5Y*
import org.rut.util.algorithm.SortUtil; ~JJuM
~i4h.ZLj
/** _k0X)N+li
* @author treeroot q"|,HpQ
* @since 2006-2-2 \a|FhhI
* @version 1.0 P,2FH2Eyj
*/ Hqel1J
public class HeapSort implements SortUtil.Sort{ ~VRt6C
j{i3lGaN
/* (non-Javadoc) 7gLN7_2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) : "|M
*/ 1e8J-Nkj
public void sort(int[] data) { T+OQa+E@P
MaxHeap h=new MaxHeap(); \,-t]$9
h.init(data); e;y\v/A
for(int i=0;i h.remove(); k* ayzg3F>
System.arraycopy(h.queue,1,data,0,data.length); lzQmD/i*
} . C g2Y
1keH1[
private static class MaxHeap{ FCC9Ht8U?
}/ p>DMN
void init(int[] data){ 9t.u9C=!F
this.queue=new int[data.length+1]; QJL%J
for(int i=0;i queue[++size]=data; DS@ZE Q`F
fixUp(size); lG\6z"K
} tSr.0'CE
} /'V(F* g
,cbCt
private int size=0; HC4vet
"k)}qI{
private int[] queue; Osb#<9{}
:u%Jrc(W
public int get() { 4,8=0[eRG
return queue[1]; kEH(\3,l
} h|=<I)}z
MeXzWLH
public void remove() { YEL,TU
SortUtil.swap(queue,1,size--); PdUlwT?8C
fixDown(1); WOW:$.VO^
} r#ISIgJXG
file://fixdown p;[">["
private void fixDown(int k) { xWwQm'I2}
int j; Hm>M}MF3
while ((j = k << 1) <= size) { Z/#&c
if (j < size %26amp;%26amp; queue[j] j++; u&q RK>wLa
if (queue[k]>queue[j]) file://不用交换 f^P:eBgpx
break; Uxla,CCp-
SortUtil.swap(queue,j,k); ~ .}
k = j; 82S?@%}#J
} e)pQh&uD
} y4%u</
private void fixUp(int k) { tE i-0J
while (k > 1) { E?{{z4
int j = k >> 1; -^C't_Q o
if (queue[j]>queue[k]) 6TN!63{Cz
break; ^BDM'
SortUtil.swap(queue,j,k); a J%&Y5L
k = j; N7S?m@
} RoV^sbWFt
} V/X4WZs|i
*Nv!Kuk
} cs'ylGH
0q|.]:][Eo
} fOE8{O^W
X2X.&^
SortUtil： 5H (CP
dKs^Dq
package org.rut.util.algorithm; |T!^&t
9ANC,+0p
import org.rut.util.algorithm.support.BubbleSort; aq'dC=y
import org.rut.util.algorithm.support.HeapSort; ikr|P&e#u
import org.rut.util.algorithm.support.ImprovedMergeSort; koiQJdK
import org.rut.util.algorithm.support.ImprovedQuickSort; b)7uz>I
import org.rut.util.algorithm.support.InsertSort; j"FX ?|4
import org.rut.util.algorithm.support.MergeSort; WD wW`
import org.rut.util.algorithm.support.QuickSort; <78]OZ] Z
import org.rut.util.algorithm.support.SelectionSort; X67.%>#3
import org.rut.util.algorithm.support.ShellSort; ]}4{|& e
wv.FL$f[@
/** udRum7XW3
* @author treeroot u/`jb2eEU:
* @since 2006-2-2 yc./:t1at>
* @version 1.0 >(v%"04|e
*/ `t0?PpUo
public class SortUtil { !$ $|zB%
public final static int INSERT = 1; hD~P)@^
public final static int BUBBLE = 2; -JL
public final static int SELECTION = 3; m7zx,bz>
public final static int SHELL = 4; ooJ ^8L
public final static int QUICK = 5; oSmv (O
public final static int IMPROVED_QUICK = 6; tc go 'V
public final static int MERGE = 7; $U,`M"
public final static int IMPROVED_MERGE = 8; 2_^{Vez@I
public final static int HEAP = 9; SfKm]Z>Hp
d>ltL`xn
public static void sort(int[] data) { [;bZQ6JR
sort(data, IMPROVED_QUICK); TTg>g~t`
} @]*b$6tt
private static String[] name={ v&BKl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gv&%2e}_
}; +&LzLF.bK
Va^AEuzF
private static Sort[] impl=new Sort[]{ Sq9I]A
new InsertSort(), \/rK0|2A
new BubbleSort(), Gp=X1 F
new SelectionSort(), B;SN}I
new ShellSort(), ;B%NFvG
new QuickSort(), ztSP4lW
new ImprovedQuickSort(), )Fc`rY
new MergeSort(), ]Lc:M'V#
new ImprovedMergeSort(), ]ne&`uO
new HeapSort() b;wf7~a*
}; "AN2K
%GRD3S
public static String toString(int algorithm){ |aH;@V
return name[algorithm-1]; pdcP;.
} H*#L~!]
@"M%ZnFu
public static void sort(int[] data, int algorithm) { UjmBLXz@T
impl[algorithm-1].sort(data); oY!nM%z/
} 44H#8kV
13oR-Stj|
public static interface Sort { nC^|83
public void sort(int[] data); V^O dTM
} owClnp9K
_dCsYI%
public static void swap(int[] data, int i, int j) { 2?3D` `
int temp = data; ;^5d^-T
data = data[j]; yNY *Fl!
data[j] = temp; K6#9HF'2I
} 7X3<8:%
} N3P!<J/tc