[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; BeVDTk:
} +112{v=!i
int i1=l; '37 {$VHw
int i2=mid+1; J#Hh4Kc
for(int cur=l;cur<=r;cur++){ H **tMq
if(i1==mid+1) |?^<=%
data[cur]=temp[i2++]; [G|.
else if(i2>r) ``WTg4C(Y
data[cur]=temp[i1++]; n]IF`kYQV
else if(temp[i1] data[cur]=temp[i1++]; }Kgi!$<aQx
else ~o^|>]
data[cur]=temp[i2++]; d,(y$V+
} CwX?%$S
} G)?*BH
;pW8a?
} M[mYG _{J
|"SZpx
改进后的归并排序: cRnDAn#42
KNAvLcg
package org.rut.util.algorithm.support; dRron_'
-pYmM d,
import org.rut.util.algorithm.SortUtil; Ea@0>_U|
f1_;da
/** pRobx
* @author treeroot L K#A
* @since 2006-2-2 N# }w1]
* @version 1.0 _k2R^/9Ct%
*/ ;]-08lzO<4
public class ImprovedMergeSort implements SortUtil.Sort { dP8qP_77A~
kT@ITA22
private static final int THRESHOLD = 10; ]AY 4bm
Ww-x+U\l
/* ..8t1+S6]
* (non-Javadoc) k2D*`\ D
* tw$EwNI[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J=3{<Xl
*/ hH1Q:}a
public void sort(int[] data) { _s^tL2Pc
int[] temp=new int[data.length]; h.vy SwF"j
mergeSort(data,temp,0,data.length-1); JI!1 .]&
} vMp=\U-~^
%1A8m-u]M
private void mergeSort(int[] data, int[] temp, int l, int r) { 1 7~Pc
int i, j, k; C|&tdh :g
int mid = (l + r) / 2; 2X2Ax~d@
if (l == r) ;O hQBAC
return; 8?nn4]P
if ((mid - l) >= THRESHOLD) s5@BVD'}E
mergeSort(data, temp, l, mid); BjH|E@z
else uQW)pD{_
insertSort(data, l, mid - l + 1); fS4foMI63)
if ((r - mid) > THRESHOLD) q0+N#$g#
mergeSort(data, temp, mid + 1, r); -NwG' U~
else ` 7iA?;
insertSort(data, mid + 1, r - mid); %Y ZCdS
fxcE1=a
for (i = l; i <= mid; i++) { FvT4?7-
temp = data; NRx 7S9W
} v)du]
for (j = 1; j <= r - mid; j++) { SSF:PTeG>
temp[r - j + 1] = data[j + mid]; 4~Cf_`X}]
} :5~Dca_iU4
int a = temp[l]; 1/9*c *w
int b = temp[r]; N9/k`ZGC
for (i = l, j = r, k = l; k <= r; k++) { F7=9> ,
if (a < b) { @H?OHpJ"`
data[k] = temp[i++]; K`N$nOw
a = temp; bW W!,-|R
} else { LOkgeJuWv
data[k] = temp[j--]; i\IpS@/{-v
b = temp[j]; yT/rH- j;5
} >V(C>^%->
} 0e8
} epnZGz,A
mHMsK}=~
/** .vKgiIC:
* @param data 6Mc&=}bV
* @param l k5\V:P=#
* @param i Ja3#W K
*/ {Ycgq%1>]
private void insertSort(int[] data, int start, int len) { 9mDdX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -I5]#%eX^
} $R#_c}
} MlWKfe<
} {O _X/y~
} aZ~e;}w.Zq
c_qox
堆排序： LkJq Bg
85# 3|5n
package org.rut.util.algorithm.support; -`q!mdA2
LBG`DYR@
import org.rut.util.algorithm.SortUtil; z\tY A
Q+Nnj(AQY
/** @~2k5pa
* @author treeroot A/=cGE
* @since 2006-2-2 6g-jhsW6
* @version 1.0 P7}w^#x
*/ w-WAgAch
public class HeapSort implements SortUtil.Sort{ qE2<vjRg
&k)+]r
/* (non-Javadoc) 3)VO{Cj!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -aJ(-Np$f
*/ 49E| f ^q
public void sort(int[] data) { %t_'rv
MaxHeap h=new MaxHeap(); G:b6Wf
h.init(data); x%X3FbF]
for(int i=0;i h.remove(); &H# l*
System.arraycopy(h.queue,1,data,0,data.length); A&1EOQ=N
} eJqx,W5MK]
yzfiH4
private static class MaxHeap{ %u%;L+0Q[
%GjG.11V,_
void init(int[] data){ Aa1#Ew<r
this.queue=new int[data.length+1]; 9Y2u/|!.3
for(int i=0;i queue[++size]=data; ; ]%fFcy
fixUp(size); 9*iVv)jd
} K_U`T;Z\
} .nIGs'P
Q']'KU.
private int size=0; E7h@c>IK
7V=deYt_p
private int[] queue; h(q4 B~
lg-`zV3
public int get() { (1S9+H>g
return queue[1]; =4q5KI
} ;t7F%cDA
WuVsW3@
public void remove() { W9gQho%9b
SortUtil.swap(queue,1,size--); }kAE
fixDown(1); tx;2C|S$oU
} 3 a(SmM:
file://fixdown A["6dbvv
private void fixDown(int k) { 5Zc
int j; 8Ie0L3d-
while ((j = k << 1) <= size) { 7202N?a {
if (j < size %26amp;%26amp; queue[j] j++; r8R7@S2V'
if (queue[k]>queue[j]) file://不用交换 n)cc\JPQ
break; 71Q`B#t0'Z
SortUtil.swap(queue,j,k); mn1!A`$
k = j; t`&mszd~T
} 6R m dt
} fC^d@4ha
private void fixUp(int k) { ajRht+{
while (k > 1) { Q>yj<DR
int j = k >> 1; m?Jnb\0
if (queue[j]>queue[k]) =WCE "X
break; dh}"uM}a
SortUtil.swap(queue,j,k); L9hL@
k = j; _j$V[=kdM/
} X%!?\3S
} sk5=$My
OvdBUcp[
} +:#g6(P]
BB,-HhYT0
} #\F8(lZ
Mf"(P.GIS
SortUtil： =S^vIo)
kdA]gpdw
package org.rut.util.algorithm; Z^F>sUMR
tm34Z''.>
import org.rut.util.algorithm.support.BubbleSort; ]Gm&Kn>
import org.rut.util.algorithm.support.HeapSort; [PrJf"Z "
import org.rut.util.algorithm.support.ImprovedMergeSort; -[=@'NP
import org.rut.util.algorithm.support.ImprovedQuickSort; LUx'Dm"
import org.rut.util.algorithm.support.InsertSort; T}p|_)&y
import org.rut.util.algorithm.support.MergeSort; Rp zuSh
import org.rut.util.algorithm.support.QuickSort; 6EWCJ%_
import org.rut.util.algorithm.support.SelectionSort; 9[E/^
import org.rut.util.algorithm.support.ShellSort; WFug-#;e
V!e`P
/** Q\~#cLJ/
* @author treeroot ieEtC,U
* @since 2006-2-2 ENYc.$r
* @version 1.0 oPAc6ObOV~
*/ 6(Cjak+~!
public class SortUtil { dg N#"
public final static int INSERT = 1; }&ew}'*9)
public final static int BUBBLE = 2; qqYQ/4Ajw
public final static int SELECTION = 3; dZ,7q_r,~
public final static int SHELL = 4; tr 8Q{
public final static int QUICK = 5; N:^4OnVR
public final static int IMPROVED_QUICK = 6; C`oB [
public final static int MERGE = 7; }D~m%%,
public final static int IMPROVED_MERGE = 8; &@&^k$du8q
public final static int HEAP = 9; aIfB^M*c5
g[{rX4~|
public static void sort(int[] data) { sQzr+]+#9
sort(data, IMPROVED_QUICK); iQh:y:Jo1&
} p{V(! v|
private static String[] name={ sYTToanA$?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 78mJ3/?rC
}; FP6JfI8
fb]=MoiJ
private static Sort[] impl=new Sort[]{ 7z&^i-l.
new InsertSort(), \Zk<|T61$
new BubbleSort(), ^^Q>AfTR.
new SelectionSort(), ||Wg'$3
new ShellSort(), ,(yaWd6
new QuickSort(), ]G~u8HPH!m
new ImprovedQuickSort(), j1@PfKh
new MergeSort(), FZ% WD@=
new ImprovedMergeSort(), <dY{@Cgw=
new HeapSort() VDy_s8Z#
}; %+$!ctn
Gm\jboef]
public static String toString(int algorithm){ {2&MyxV
return name[algorithm-1]; ^6,}*@
} mc6W"
s[*I210
public static void sort(int[] data, int algorithm) { F.R0c@&W
impl[algorithm-1].sort(data); aOW~! f/M
} \?k"AtL
tUFXx\p
public static interface Sort { "FfP&lF/
public void sort(int[] data); o, qBMo^.
} 0vz!)
H%Sx*|
public static void swap(int[] data, int i, int j) { .V^h<d{
int temp = data; HtI>rj/\ x
data = data[j]; @v\jL+B+m
data[j] = temp; |i'w"Tz4
} Ef6LBNWY.
} hniTMO