[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; `YVdIDl]
} YK!nV ,
int i1=l; f;!1=/5u-
int i2=mid+1; <]eWr:;
for(int cur=l;cur<=r;cur++){ ^8Tq0>n?
if(i1==mid+1) 1`)ie%=
data[cur]=temp[i2++]; fWhwI+
else if(i2>r) xbnx*4o0
data[cur]=temp[i1++]; h-+9Bv]
else if(temp[i1] data[cur]=temp[i1++]; 6QkdH7Qf=
else v: cO+dQ
data[cur]=temp[i2++]; Uh'3c"
} jw?/@(AC6
} ;:,hdFap
k(+EY%
} K??%Qh5l+C
lCLz!k2di
改进后的归并排序: sXDS_Q
V0q./NuO
package org.rut.util.algorithm.support; RMUR@o5N
i 2hP4<;h
import org.rut.util.algorithm.SortUtil; Eqc&iS~
oXRmnt
/** X|^E+ `M4
* @author treeroot ,+-l1GpL
* @since 2006-2-2 8u Tq0d6(
* @version 1.0 X1?7}VO
*/ =kH7
public class ImprovedMergeSort implements SortUtil.Sort { DygMavA.
Q*&>Ui[&
private static final int THRESHOLD = 10; s%z\szd*
.I$Q3%s
/* )XV|D
* (non-Javadoc) ,X25-OFZ
* ,V'+16xW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) izy7.(.a
*/ Tqz{{]%j~$
public void sort(int[] data) { :#s6,
int[] temp=new int[data.length]; bO]^TRaiJ
mergeSort(data,temp,0,data.length-1); !#j y=A
} &b8Dy=#
DXu#07\
private void mergeSort(int[] data, int[] temp, int l, int r) { {R%v4#nk
int i, j, k; Kmc*z (Q
int mid = (l + r) / 2; ~Mbo`:>(4v
if (l == r) =)5O(h
return; ((&_m9a
if ((mid - l) >= THRESHOLD) 9g3e( z@
mergeSort(data, temp, l, mid); zs|R#?a=
else 0$NcxbM
insertSort(data, l, mid - l + 1); SxMmy
if ((r - mid) > THRESHOLD) *yKw@@d+p
mergeSort(data, temp, mid + 1, r); F^.w:ad9<
else @{*z1{
insertSort(data, mid + 1, r - mid); RAYDl=}
f1w&D ]|S+
for (i = l; i <= mid; i++) { rOQ@(aUAZ
temp = data; &6<>hqR^
} ATl.Qku@
for (j = 1; j <= r - mid; j++) { 9Jd{HI=
temp[r - j + 1] = data[j + mid]; > 2_xRn<P
} 2k;>nlVxX
int a = temp[l]; $*w]]b$Dn
int b = temp[r]; gEcRJ1Q;C
for (i = l, j = r, k = l; k <= r; k++) { hEla8L4Y
if (a < b) { 2Z K:S+c
data[k] = temp[i++]; x>:~=#Vi
a = temp; kx&Xk0F_g
} else { {U@&hE -
data[k] = temp[j--]; y|X</3w
b = temp[j]; Z BjyQ4h
} hr3RC+ y
} >a/]8A
} Gu[G_^>
lz=$Dz
/** LA &W@
* @param data \) DJo
* @param l )7!q>^S{B
* @param i VqGmZ|+8
*/ Ey<vvZ
private void insertSort(int[] data, int start, int len) { ln4gkm<]t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s|B
} eGcc'LBr;
} F]o&m::/K
} SNqw2f5
} [ u7p:?WDW
F/,K8<|r>
堆排序： 4)MKYhm
=)_9GO
package org.rut.util.algorithm.support; A+Uil\%
-OV:y],-
import org.rut.util.algorithm.SortUtil; 6[3oOO:uo
\yt-_W=[
/** Sl,X*[HGd
* @author treeroot Mj&`Y gW5a
* @since 2006-2-2 D>Ij
* @version 1.0 3ht>eaHi
*/ n^vL9n_N
public class HeapSort implements SortUtil.Sort{ S:!gj2q9|
c#o(y6
/* (non-Javadoc) %c+`8 wj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 12l-NWXf
*/ C1w~z4Qp
public void sort(int[] data) { uP|Py.+
MaxHeap h=new MaxHeap(); :yg:sU
h.init(data); PP/EZ^]b
for(int i=0;i h.remove(); PF=BXY1<UL
System.arraycopy(h.queue,1,data,0,data.length); qyi5j0)W
} B=)&43)\
>f)/z$ qn
private static class MaxHeap{ DD 8uG`<
Cg{V"B:
void init(int[] data){ 9vIqGz-o
this.queue=new int[data.length+1]; WRa1VU&f
for(int i=0;i queue[++size]=data; Fu0"Asxce
fixUp(size); `y"(\1
} Dxp8^VL
} f};lH[B3y
> mI1wV[
private int size=0; P`z#tDT^"
v9?hcJ=
private int[] queue; R"@J*\;$T
H}v.0R
public int get() { '+?L/|'
return queue[1]; 6<aZr\Ufg
} 2AYV9egZ
p@B/S(Xi
public void remove() { nE"##2X
SortUtil.swap(queue,1,size--); ^d6}rtG
fixDown(1); YY{0WWua
} IQz"FH?
file://fixdown {jyI7r#X
private void fixDown(int k) { {WokH;a/
int j; `Wc"Ix0
while ((j = k << 1) <= size) { ZiR },F/
if (j < size %26amp;%26amp; queue[j] j++; z=\y)'b
if (queue[k]>queue[j]) file://不用交换 etnq{tE5
break; )y~FeKh
SortUtil.swap(queue,j,k); %@C(H%obWd
k = j; V2Iqk]V%y
} FKYPkFB
} +Cs[]~
private void fixUp(int k) { u.\FNa
while (k > 1) { ;4(ULJ*
int j = k >> 1; U`)\|\NY
if (queue[j]>queue[k]) C:r@)Mhq
break; ?+3vK=Rf}
SortUtil.swap(queue,j,k); +#* F"k(
k = j; .\Z/j
} *??!~RE
} 1co;U
R7'6#2y
} x}^:Bs+j
IBP3
} 'gBGZ?^N!U
&#[w*t(A
SortUtil： tW^oa
]81t~t9LQ
package org.rut.util.algorithm; X283.?
&^q!,7.J
import org.rut.util.algorithm.support.BubbleSort; c:*[HO\
import org.rut.util.algorithm.support.HeapSort; f$7Xh~
import org.rut.util.algorithm.support.ImprovedMergeSort; #|92+
import org.rut.util.algorithm.support.ImprovedQuickSort; k4n4BL
import org.rut.util.algorithm.support.InsertSort; CBkI! In2
import org.rut.util.algorithm.support.MergeSort; cj[a^ ZH
import org.rut.util.algorithm.support.QuickSort; EN,PI~~F
import org.rut.util.algorithm.support.SelectionSort; c >O>|*I
import org.rut.util.algorithm.support.ShellSort; kdgU1T@y.
g4eEkG`XTS
/** 5{zmuv:
* @author treeroot \C{Dui)F
* @since 2006-2-2 7dm:L'0
* @version 1.0 H[WsHq;T+9
*/ Uzi.CYVs%
public class SortUtil { ol[sX=5 *
public final static int INSERT = 1; |2L|Zp&
public final static int BUBBLE = 2; o"kVA;5<G
public final static int SELECTION = 3; `j#zwgUs
public final static int SHELL = 4; :D|5E>o(
public final static int QUICK = 5; W?>C$_p C
public final static int IMPROVED_QUICK = 6; [TW?sW^0
public final static int MERGE = 7; GgU8f0I
public final static int IMPROVED_MERGE = 8; KF.O>c87&
public final static int HEAP = 9; lRk)
g)3HVAT
public static void sort(int[] data) { Vx Vpl@
sort(data, IMPROVED_QUICK); k^H&IS!
} thU9s%,
private static String[] name={ =00c1v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^y,Ex;6o
}; Za110oF
~M c'~:{O
private static Sort[] impl=new Sort[]{ ]NEr]sc-"F
new InsertSort(), cD%_+@GaU
new BubbleSort(), S|jE1v"L
new SelectionSort(), L2sUh+'|
new ShellSort(), o^efeI
new QuickSort(), +UM%6Z=+
new ImprovedQuickSort(), $q|-9B
new MergeSort(), yv;KKQ
new ImprovedMergeSort(), mhNX05D
new HeapSort() 5V $H?MW>
}; mi';96
LJ8 t@ui
public static String toString(int algorithm){ >fq]c
return name[algorithm-1]; sQ}E4Iq1#S
} ;_K3/:
XfYbWR
public static void sort(int[] data, int algorithm) { MwuRxeRO-
impl[algorithm-1].sort(data); WR.>?IG2E
} >iV2>o_
+QW|8b
public static interface Sort { '=WPi_Z5:C
public void sort(int[] data); FUO9jX
} w-j^jU><3
L-9AJk>V
public static void swap(int[] data, int i, int j) { C>:,\=y%
int temp = data; o#Viz:
data = data[j]; <G_71J`MLC
data[j] = temp; zk;'`@7
} 5Ic'6AIz
} @*<`*W