[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; 0D'Wr(U(
} |^F-.Z
int i1=l; eZ!k'bS=
int i2=mid+1; qkIU>b,B
for(int cur=l;cur<=r;cur++){ $o/>wgQY-
if(i1==mid+1) @2mP
data[cur]=temp[i2++]; &0g,Xkr
else if(i2>r) ]VvJ1Xn0
data[cur]=temp[i1++]; c;^J!e
else if(temp[i1] data[cur]=temp[i1++]; ^Toi_
else ff#-USK^R
data[cur]=temp[i2++]; cabN<a l
} ^6+x0[13
} #jX>FXo
@I&"P:E0F;
} =Wf@'~K0k"
`T70FsSJ
改进后的归并排序: QP#Wfk(C
#-;BU{3*
package org.rut.util.algorithm.support; ~laZ(Bma);
:m d3@r']
import org.rut.util.algorithm.SortUtil; ng*%1;P
=r~.I
/** z m'jk D|
* @author treeroot ! Cl/=0$[L
* @since 2006-2-2 +2SX4Kxu
* @version 1.0 Iqsk\2W]a3
*/ qC)VT3
public class ImprovedMergeSort implements SortUtil.Sort { .N=hA
qj&)w9RLJE
private static final int THRESHOLD = 10; />C~a]}
+!vRU`
/* M2}<gRL*}J
* (non-Javadoc) ZhsZywM
* "b 0cj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h6*`V
*/ U3}R^W~eb
public void sort(int[] data) { vNC0M:p,
int[] temp=new int[data.length]; ]D%k)<YK
mergeSort(data,temp,0,data.length-1); N-gRfra+8L
} 6<Z:Xw
spJ(1F{|V
private void mergeSort(int[] data, int[] temp, int l, int r) { 4*x!B![]y
int i, j, k; PAHlj,n)
int mid = (l + r) / 2; 0Mg8{
if (l == r) F:S,{&jB
return; W[Bu&?h$
if ((mid - l) >= THRESHOLD) 7g)3\C
mergeSort(data, temp, l, mid); @@wx~|%
else CeTr%j
insertSort(data, l, mid - l + 1); _sVs6AJ
if ((r - mid) > THRESHOLD) 86#mmm)
mergeSort(data, temp, mid + 1, r); >Mw &Tw}o
else #ja`+w}
insertSort(data, mid + 1, r - mid); P0xLx
|lxy< C4V
for (i = l; i <= mid; i++) { +ZKhmb!
temp = data; |Vi&f5p,@
} U*Qq5=dqD
for (j = 1; j <= r - mid; j++) { 'c&@~O;^d
temp[r - j + 1] = data[j + mid]; 4_+Pv6
} K//T}-Uub
int a = temp[l]; N}fUBX4k
int b = temp[r]; N-`;\
for (i = l, j = r, k = l; k <= r; k++) { hXm}d\
if (a < b) { ,dx)rZ*
data[k] = temp[i++]; JtpY][}"~3
a = temp; L\NZDkd
} else { A Vm{#^p[(
data[k] = temp[j--]; N?;o_^C
b = temp[j]; `mjx4Lb
} 7[g;|(G0
} rxj@NwAno
} ^,lZ58 2
Rt^<xXX$
/** p{q!jm~Nq
* @param data 4q13xX
* @param l c1kxKxE
* @param i ]<gCq/V#
*/ A&c@8
private void insertSort(int[] data, int start, int len) { ]^9* t,{9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y?n2`l7f
} =`~Z@IbdI
} c%@~%IGF
} {|Ki^8h/p
} (YHvGGr
bz0P49%
堆排序： Ia`JIc^e
P4j8`}&/
package org.rut.util.algorithm.support; W[E3P,XS
xwnoZ&h
import org.rut.util.algorithm.SortUtil; :KSor}t
JhCkkw
/** N4mJU'_{
* @author treeroot s;2/Nc
* @since 2006-2-2 ~59`S#ax/l
* @version 1.0 M+;P?|a
*/ +}QBzGW`
public class HeapSort implements SortUtil.Sort{ u=;nU(]M '
!?o$-+a|
/* (non-Javadoc) ^YR|WKY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oD#>8Aws
*/ kq~[k.
public void sort(int[] data) { rEyz|k:
MaxHeap h=new MaxHeap(); ,LW+7yD
h.init(data); c5E#QV0&v~
for(int i=0;i h.remove(); [OZ=iz.
System.arraycopy(h.queue,1,data,0,data.length); rN1U.FRe/
} - SS r
~sIGI?5f
private static class MaxHeap{ EeJqszmH
j;20JA/b
void init(int[] data){ 0[:9 Hb6
this.queue=new int[data.length+1]; Ae j
for(int i=0;i queue[++size]=data; K- I\P6R`
fixUp(size); #[a"%byTR
} ) wY!/&
} g&+Y{*Gp
qC1U&b#MVx
private int size=0; H5rPq_R
P:(EU s}0
private int[] queue; .L7Yf+yFg
/^LH
public int get() { *SkiFEoD
return queue[1]; j\'+wVyo
} px|>v8
1Vf78n
public void remove() { oY%"2PW1B
SortUtil.swap(queue,1,size--); a1G9wC:e
fixDown(1); *i?rJH
} |vfujzRZ
file://fixdown +z|UpI
private void fixDown(int k) { 3gG+`{<
int j; "65||[=8
while ((j = k << 1) <= size) { *:9 >W$0u
if (j < size %26amp;%26amp; queue[j] j++; H5Ux.]y
if (queue[k]>queue[j]) file://不用交换 =0h|yjnL/
break; 0aC2 Pym^
SortUtil.swap(queue,j,k); Wk`bb!P_
k = j; 6KEykw j
} lC=N:=Mu
} }2ql?K
private void fixUp(int k) { ^p 2.UW
while (k > 1) { dXiE.Si
int j = k >> 1; O xT}I
if (queue[j]>queue[k]) {jOzap|
break; xN`r4
SortUtil.swap(queue,j,k); @%OPy|=,{
k = j; -J"qrpZ^
} 7-".!M
} s]y-pZ
[J)/Et
} n .f4z<
-,QKTxwo>
} X!o[RJY
6| *(dE2x(
SortUtil： -RG8<bI,
euV$2Fg
package org.rut.util.algorithm; s, n^
?}'N_n ys
import org.rut.util.algorithm.support.BubbleSort; ]?0{(\
import org.rut.util.algorithm.support.HeapSort; e9CP802#2
import org.rut.util.algorithm.support.ImprovedMergeSort; \G$QNUU
import org.rut.util.algorithm.support.ImprovedQuickSort; & u$(NbK
import org.rut.util.algorithm.support.InsertSort; {I0w`xe
import org.rut.util.algorithm.support.MergeSort; @B,j;2eb
import org.rut.util.algorithm.support.QuickSort; xwPI
import org.rut.util.algorithm.support.SelectionSort; {y,nFxLq
import org.rut.util.algorithm.support.ShellSort; k"">2#V
I&L.;~
/** U^%9 )4bj
* @author treeroot rO/a,vV
* @since 2006-2-2 "^;#f+0
* @version 1.0 HLjvKE=W
*/ &Nc[$H7<
public class SortUtil { )@}A r
public final static int INSERT = 1; }m6f^fs}
public final static int BUBBLE = 2; [34zh="o
public final static int SELECTION = 3; 1ZT^)/G
public final static int SHELL = 4; Wrmgu}q
public final static int QUICK = 5; 3A-*vaySV
public final static int IMPROVED_QUICK = 6; "\}b!gl$8
public final static int MERGE = 7; pw@`}cM=
public final static int IMPROVED_MERGE = 8; ]\A1mw-T
public final static int HEAP = 9; w#*/y?"D
m8'@UzB
public static void sort(int[] data) { bb|}'
sort(data, IMPROVED_QUICK); >s&XX, w
} ;\N79)Gk
private static String[] name={ /"=29sWB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bk,2WtVX
}; q75ky1^1:
(tepmcf
private static Sort[] impl=new Sort[]{ Le*`r2
new InsertSort(), 0|g[o:;fl_
new BubbleSort(), WtIMvk
new SelectionSort(), }N?g|
new ShellSort(), O?CdAnhQc`
new QuickSort(), d]U`?A,
new ImprovedQuickSort(), ~?gzq~~t
new MergeSort(), .>}BNy
new ImprovedMergeSort(), 0HqPyM13Q
new HeapSort() >-!r9"8@
}; +A@m9
<mL%P`Jj
public static String toString(int algorithm){ C 8N%X2R
return name[algorithm-1]; C1b*v&1{
} z. 'Fv7
$; ?c?n+
public static void sort(int[] data, int algorithm) { KyTuF
impl[algorithm-1].sort(data); ;_}~%-_ ~
} W!t{rI72
rn;<HT
public static interface Sort { /iplU
public void sort(int[] data); +jUgx;u,
} FC{})|yh }
a0PE^U
public static void swap(int[] data, int i, int j) { `M:DZNy,
int temp = data; 42&v% ;R
data = data[j]; kVd5,Qd
data[j] = temp; `?l3Ct*
} vv+km+
} (~JwLe@a