[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; <c}@lj-j
} KyyRHf5
int i1=l; +yP!7]
int i2=mid+1; uxf,95<g)
for(int cur=l;cur<=r;cur++){ $.jGO!
if(i1==mid+1) X+;[Gc}(W
data[cur]=temp[i2++]; ?Zb+xNKJ(
else if(i2>r) 3NpB1lgh&:
data[cur]=temp[i1++]; q}P@}TE
else if(temp[i1] data[cur]=temp[i1++]; DO:,PZX
else J9mK9{#q
data[cur]=temp[i2++]; <T_3s\
} bTD?uX!^@
} cT'Bp)a
uE's&H
} 4EqThvI{
}93kHO{
改进后的归并排序: Cb;6yE)!Z
AY/.vyS
package org.rut.util.algorithm.support; ;R*-cm
jaoZ}}V_$
import org.rut.util.algorithm.SortUtil; [Fr](&Tx
/w?e(v<
/** KOy{?
* @author treeroot _@ao$)q{J
* @since 2006-2-2 *?X&Y8Kf
* @version 1.0 huC{SzXM
*/ *E/Bfp1LIe
public class ImprovedMergeSort implements SortUtil.Sort { ;b{#$#`=
cLZ D\1Mt
private static final int THRESHOLD = 10; K3!3[dR*
=d{6=2Pt
/* 4zMvHe
* (non-Javadoc) [bh?p+V
* ws0qwv#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i6if\B
*/ sq'm)g
public void sort(int[] data) { kOQ)QX
int[] temp=new int[data.length]; I0}.!
mergeSort(data,temp,0,data.length-1); ukR0E4p
} \L*%?~
dtR"5TL<~}
private void mergeSort(int[] data, int[] temp, int l, int r) { /z-rBfdy^
int i, j, k; S8#0Vo$)a
int mid = (l + r) / 2; 9\_s&p=:.
if (l == r) Clum m@z;#
return; P =X]'m_B
if ((mid - l) >= THRESHOLD) $Z G&d
mergeSort(data, temp, l, mid); xvTtA61Vp
else Z@Rm^g]o
insertSort(data, l, mid - l + 1); .RxTz9(
if ((r - mid) > THRESHOLD) W>pe-
mergeSort(data, temp, mid + 1, r); JqzoF}WH
else rRe5Q
insertSort(data, mid + 1, r - mid); f-F=!^.
+fVvH
for (i = l; i <= mid; i++) { 1bV G%N
temp = data; D:@W*,
} :=NXwY3~M
for (j = 1; j <= r - mid; j++) { JQM_96\
temp[r - j + 1] = data[j + mid]; _BewaI;w
} wo`.sB&T
int a = temp[l]; 8:TX9`,
int b = temp[r]; 7:UeE~uB:
for (i = l, j = r, k = l; k <= r; k++) { d7V/#34
if (a < b) { s 4`-mIa
data[k] = temp[i++]; lO-DXbgql$
a = temp; xv]z>4@z,
} else { [7@blU
data[k] = temp[j--]; /]U$OP*0
b = temp[j]; ,l>w9?0Z
} E'WXi!>7p
} MJ:c";KCq0
} zVE" 6
mE<_oRM)
/** v<1@"9EH
* @param data 84(Jo_9
* @param l (@^9oN~}
* @param i 45JL{YRN
*/ *Dg@fxCQ
private void insertSort(int[] data, int start, int len) { Wg}KQ6 6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >|SIqB<%:
} -m`|Sq
} Km5_P##
} Gld~GyB\k
} @)b'3~D
ko}& X=
堆排序： ;<FAcR
%j&vV>2
package org.rut.util.algorithm.support; +-!3ruwSn
d*6f,z2=
import org.rut.util.algorithm.SortUtil; :BxO6@>Xc
&;$uU
/** 2U./ Yfk\
* @author treeroot =zn'0g,J4
* @since 2006-2-2 dy6zrgxygP
* @version 1.0 B!&5*f}*
*/ !td!">r46e
public class HeapSort implements SortUtil.Sort{ :I#.d7`uk
^(;x-d3
/* (non-Javadoc) oCCtjr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ROkwjw
*/ qJ;~ANwt
public void sort(int[] data) { XIIq0I
MaxHeap h=new MaxHeap(); ?A@y4<8R|
h.init(data); :j]6vp6
for(int i=0;i h.remove(); ,ojJ;w5D
System.arraycopy(h.queue,1,data,0,data.length); oRbWqN`F.
} g]f<k2
29:2Xu i
private static class MaxHeap{ sPK]:iC
1sXCu|\q
void init(int[] data){ "==c
this.queue=new int[data.length+1]; "W5MZ
for(int i=0;i queue[++size]=data; I!/EQO|
fixUp(size); O<vBuD2
} .w4|$.H
} z_'^=9m
Qy:yz
private int size=0; s4Ja y!A
+Ug &
private int[] queue; x;[)#>.'
:3M,]W]
public int get() { |co#X8J
return queue[1]; %/2 ` u
} `*U@d%a
e,OXngC
public void remove() { r8(oTx
SortUtil.swap(queue,1,size--); \gP?uJ
fixDown(1); ](oeMl18R
} <~|n}&
file://fixdown #s~ITG#H
private void fixDown(int k) { *$7^.eHfdd
int j; %ZRv+}z
while ((j = k << 1) <= size) { Z*Ffdh>*:&
if (j < size %26amp;%26amp; queue[j] j++; Hl$qmq
if (queue[k]>queue[j]) file://不用交换 Q^{TcL8
break; .EhC\QpP
SortUtil.swap(queue,j,k); f?Ex$gnI
k = j; 2@(+l*.Q
} ^fKKsfIf
} .yF-<Y
private void fixUp(int k) { n*GB`I*g
while (k > 1) { MO~T_6
int j = k >> 1; ywm"{ U?8
if (queue[j]>queue[k]) 7UBW3{d/u5
break; -F`gRAr-
SortUtil.swap(queue,j,k); .x$V~t
k = j; E`N`
} k8E2?kbF
} uhq6dhhR
9ZOQNN<ex
} _ (b4|hJ'
Wda?$3!^q
} @%g:'^/
_Nh])p-
SortUtil： oxFd@WV5
e$
package org.rut.util.algorithm; M]V j
pYCMJK-H
import org.rut.util.algorithm.support.BubbleSort; {X,-T&
import org.rut.util.algorithm.support.HeapSort; ->|eMV'd
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Ip\`2^u
import org.rut.util.algorithm.support.ImprovedQuickSort; uEPm[oyX
import org.rut.util.algorithm.support.InsertSort; Le~D"d8
import org.rut.util.algorithm.support.MergeSort; o<b
import org.rut.util.algorithm.support.QuickSort; djf8FNnn
import org.rut.util.algorithm.support.SelectionSort; fwtsr>SV
import org.rut.util.algorithm.support.ShellSort; `mkOjsj &
:V8oWMY
/** :TrP3wV_
* @author treeroot o ^w^dgJ
* @since 2006-2-2 +2E~=xX
* @version 1.0 ~DLxIe
*/ r(]Gd`]
public class SortUtil { U;&s=M0[
public final static int INSERT = 1; ;Qd'G7+
public final static int BUBBLE = 2; H"+|n2E^
public final static int SELECTION = 3; H|s Iw:
public final static int SHELL = 4; F\+9u$=
public final static int QUICK = 5; j; /@A lZl
public final static int IMPROVED_QUICK = 6; SFWS<H(IN
public final static int MERGE = 7; 5UL5C:3R9
public final static int IMPROVED_MERGE = 8; `iuQ.I
public final static int HEAP = 9; %_]O|(
7OZ0;fK
public static void sort(int[] data) { '(ETXQ@
sort(data, IMPROVED_QUICK); @bkSA
} k;umLyz
private static String[] name={ g3n>}\xG>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E#w2'(t
}; I2{zy|&
.O5|d+S
private static Sort[] impl=new Sort[]{ #;2mP6a[
new InsertSort(), cL%eP.
new BubbleSort(), ">|L<
new SelectionSort(), Qm3RXO
new ShellSort(), W*c^(W
new QuickSort(), 1%.CtTi
new ImprovedQuickSort(), ~O;?;@
new MergeSort(), %|}7YH41
new ImprovedMergeSort(), l5e`m^GK
new HeapSort() IxG0TJ_
}; Qe[ai?iJkt
k:s86q
public static String toString(int algorithm){ n-9X<t|*?a
return name[algorithm-1]; DKQQZ`PF
} c1%ki%J#
<Dnv=)Rq
public static void sort(int[] data, int algorithm) { G* mLb1
impl[algorithm-1].sort(data); o,1Fzdh6(
} uN9.U _
arPqVMVr
public static interface Sort { :fG9p`
public void sort(int[] data); 2\}6b4
} .dBW{|gN
wW/wvC-
public static void swap(int[] data, int i, int j) { h7\EN
int temp = data; ELV$!f|u
data = data[j]; +]Bx4r?p
data[j] = temp; %gEfG#S
} +DT)7koA
} xI=[=;L