[JAVA]用Java实现的各种排序

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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; $yx\2
} 6ld4'oM
int i1=l; ">[#Ops-;$
int i2=mid+1; *D|a`R!Y
for(int cur=l;cur<=r;cur++){ WZ'Z"'
if(i1==mid+1) 1Dr&BXvf]8
data[cur]=temp[i2++]; 7(84j5zb
else if(i2>r) W\l&wR
data[cur]=temp[i1++]; <{#_;7h"
else if(temp[i1] data[cur]=temp[i1++]; QP\9#D~
else gWr7^u&q@|
data[cur]=temp[i2++]; 'WW:'[Syn'
} @} Ig*@
} cQEUHhRg!
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} #QwkRzVoy
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改进后的归并排序: Y D<3#Dr]
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package org.rut.util.algorithm.support; SA<\n+>q^
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import org.rut.util.algorithm.SortUtil; S70#_{
[QnN1k
/** "W(D0oy
* @author treeroot d]0:r]e
* @since 2006-2-2 w;,34qbf
* @version 1.0 <q7o"NI6FZ
*/ T]\1gs41
public class ImprovedMergeSort implements SortUtil.Sort { V#Wy` ce
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private static final int THRESHOLD = 10; cy^=!EfA
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/* =F@ +~)_
* (non-Javadoc) *q6XK_
* X7$]qE K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t=Oq<r
*/ xUn"XkhP
public void sort(int[] data) { mOJdx-q?r
int[] temp=new int[data.length]; BeUyt
mergeSort(data,temp,0,data.length-1); `Abd=1nH
} LGhK)]:
c4AJ`f.5
private void mergeSort(int[] data, int[] temp, int l, int r) { naR<
int i, j, k; !Q>xVlPVu
int mid = (l + r) / 2; { {\oC$
if (l == r) $UzSPhv[
return; KPToyCyR1
if ((mid - l) >= THRESHOLD) A}lxJ5h0
mergeSort(data, temp, l, mid); M@T{uo
else v-#,@&Uwq
insertSort(data, l, mid - l + 1); )+L|<6JXA
if ((r - mid) > THRESHOLD) AGFA;X
mergeSort(data, temp, mid + 1, r); 54p{J
else Z'i@;^=A
insertSort(data, mid + 1, r - mid); +QN4hJK
$2uC%er"H
for (i = l; i <= mid; i++) { myj/93p}`b
temp = data; 20}HTV{v
} >*EZZ\eU!
for (j = 1; j <= r - mid; j++) { $q\"d?n
temp[r - j + 1] = data[j + mid]; {<{VJGY7T
} 8-<F4^i_i
int a = temp[l]; S})f`X9_}
int b = temp[r]; '#c#.O
for (i = l, j = r, k = l; k <= r; k++) { J'2 Yrn
if (a < b) { |YLja87
data[k] = temp[i++]; wS=vm}}u
a = temp; fnX[R2KZ
} else { fd4gB6>
data[k] = temp[j--]; B :%Vq2`
b = temp[j]; 43k'96[2d
} 5$ik|e^:y
} u4hn9**a1
} o%'1=d3R1Q
YXp\C"~g
/** vN(~}gOd\
* @param data G/JGb2I/7|
* @param l N5K(yY_T
* @param i -L/%2 X
*/ N)mZ!K44
private void insertSort(int[] data, int start, int len) { ?pIELezfK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -Y524
} }aOqoi7w
} 8Ay7I
} \HB fM&
} F%V|Aa
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堆排序： `!cdxKLR
#;8)UNc)}
package org.rut.util.algorithm.support; Y%/RGYKh
4 Y=0>FlY0
import org.rut.util.algorithm.SortUtil; V<5. 4{[G
C rR/
/** $*eYiz3Ue
* @author treeroot [CEV&B
* @since 2006-2-2 "3VX9{'%@
* @version 1.0 N&G'i.w/
*/ D zD5n
public class HeapSort implements SortUtil.Sort{ .iV=ybMT
B!mHO*g
/* (non-Javadoc) 3PkZXeH/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fYuSfB+<
*/ !y$##PZ
public void sort(int[] data) { oU)(/
MaxHeap h=new MaxHeap(); K\ Wzh;
h.init(data); g#i~^4-1
for(int i=0;i h.remove(); 3chx4
System.arraycopy(h.queue,1,data,0,data.length); WzFXF{(
} z#!<[**&
Aq(cgTNW
private static class MaxHeap{ I'IFBVhaYn
GDCp@%xW
void init(int[] data){ 6)sKg{H
this.queue=new int[data.length+1]; tC'#dU`=qY
for(int i=0;i queue[++size]=data; rL\}>VC)
fixUp(size); Rng-o!
} HIw)HYF2
} |-6`S1.
8G)~#;x1
private int size=0; I._ A
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private int[] queue; dm/3{\ 4
7W}%ralkg
public int get() { !Fs$W
return queue[1]; \X\< +KU
} s2L]H
5 v.&|[\k
public void remove() { A'CD,R+gR
SortUtil.swap(queue,1,size--); 3]1 !g6
fixDown(1); '?$@hqQn
} mKtMI!FR
file://fixdown U;3t{~Ym
private void fixDown(int k) { h];H]15&
int j; 9Pg6,[*u
while ((j = k << 1) <= size) { ,62~u'hR5
if (j < size %26amp;%26amp; queue[j] j++; e,#w*|
if (queue[k]>queue[j]) file://不用交换 T7i>aM$+
break; "3jTU
SortUtil.swap(queue,j,k); Ngx2N<$<*g
k = j; %H?B5y
} f'ld6jt|%
} *[cCY!+Qy
private void fixUp(int k) { 4w|t|?
while (k > 1) { 2wO8;wiA
int j = k >> 1; Wj3i*x$
if (queue[j]>queue[k]) [[_>DM
break; Z[[*:9rY|
SortUtil.swap(queue,j,k); '9]?jkl
k = j; DCa[?|Y
} i5(qJ/u
} n]vCvmt
7>im2"zm
} %_n%-Qn
?`OFn F,K
} (ID%U
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SortUtil： EyR/
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package org.rut.util.algorithm; 6{d?3Jk
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import org.rut.util.algorithm.support.BubbleSort; W`LG.`JW
import org.rut.util.algorithm.support.HeapSort; \="U|LzG
import org.rut.util.algorithm.support.ImprovedMergeSort; :BR_%$
import org.rut.util.algorithm.support.ImprovedQuickSort; r[):'ys,C
import org.rut.util.algorithm.support.InsertSort; =M:Po0?0E
import org.rut.util.algorithm.support.MergeSort; fiC0'4.,
import org.rut.util.algorithm.support.QuickSort; ?v,c)
import org.rut.util.algorithm.support.SelectionSort; tMdSdJ8
import org.rut.util.algorithm.support.ShellSort; QpzdlB44l
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/** A/9<} m
* @author treeroot JkR%o #>5
* @since 2006-2-2 noaR3)
* @version 1.0 ]~$@x=p2e
*/ ~:,}?9
public class SortUtil { _Cf:\Xs m
public final static int INSERT = 1; nGTGX
public final static int BUBBLE = 2; Ax|'uvVAPT
public final static int SELECTION = 3; I`xC0ZUKj
public final static int SHELL = 4; **-rPonM[
public final static int QUICK = 5; UazK0{t<f
public final static int IMPROVED_QUICK = 6; RJ3uu NK7
public final static int MERGE = 7; 8|= c3Z
public final static int IMPROVED_MERGE = 8; )Dms9:
public final static int HEAP = 9; KiMlbF.~V
*eD[[HbKX
public static void sort(int[] data) { l %zbx"%x
sort(data, IMPROVED_QUICK); nQ'NS
} sBWyUD
private static String[] name={ HQF@@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VxOWv8}|
}; gs0jwI
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private static Sort[] impl=new Sort[]{ /xSJljexz
new InsertSort(), Q7`)&^ Hx
new BubbleSort(), @)MG&X
new SelectionSort(), jB9~'>JY
new ShellSort(), &B:L9^
new QuickSort(), Xa-TNnws?
new ImprovedQuickSort(), u1kCvi#N
new MergeSort(), *Q2 oc:6
new ImprovedMergeSort(), _UP 9b@Z"
new HeapSort() /Xc9}~t6
}; 1fJ~Wp @1
vnf2Z,f%
public static String toString(int algorithm){ w"D1mI!L 7
return name[algorithm-1]; GGLSmfb)
} ,|8aDL?
e7n0=U0
public static void sort(int[] data, int algorithm) { lZkJ<*z#
impl[algorithm-1].sort(data); ?t}s3P!Q3w
} {{bwmNv"
:Eh}]_
public static interface Sort { uZf 6W<a
public void sort(int[] data); d/+s-g p
} B<myt79F_[
67H?xsk@n
public static void swap(int[] data, int i, int j) { REcKfJTj
int temp = data; bFG?mG:
data = data[j]; {[bpvK
data[j] = temp; n}9<7e~/
} 9I5AYa?
} L|D9+u L