[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; t8)Fkx#8}
} 3^su%z_%
int i1=l; IB*%PMTF
int i2=mid+1; U0N[~yW(t1
for(int cur=l;cur<=r;cur++){ 3.d=1|E
if(i1==mid+1) ,.}PZL
data[cur]=temp[i2++]; uV 6f~cQ
else if(i2>r) G(0bulq
data[cur]=temp[i1++]; j^!J:Bj
else if(temp[i1] data[cur]=temp[i1++]; _Wb-&6{
else *,-YWx4
data[cur]=temp[i2++]; S5Px9&N8(
} %""CacX
} _1R`xbV
X}usyO'pW
} WAdl@){
:6M0`V;L
改进后的归并排序: @g=A\2
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package org.rut.util.algorithm.support; -owfuS?i=
gCm?nb)
import org.rut.util.algorithm.SortUtil; Xs`:XATb/
ev guw*u
/** YHRI UYd
* @author treeroot &'](T9kg=
* @since 2006-2-2 R&alq
* @version 1.0 4*9Dh
*/ wRiP5U,
public class ImprovedMergeSort implements SortUtil.Sort { iN{TTy
h.Dk>H_G
private static final int THRESHOLD = 10; Dps{[3Y+
TwhK>HN
/* 8\V-aow
* (non-Javadoc) ^LcI6h
* YI|Gpq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) */+s^{W7
*/ Y3zO7*-@
public void sort(int[] data) { ;_SS3q
int[] temp=new int[data.length]; %!$-N!e
mergeSort(data,temp,0,data.length-1); +|8Lt[^ux
} q9!#S
bT*4Qd4W
private void mergeSort(int[] data, int[] temp, int l, int r) { Sd\@Q% }o\
int i, j, k; h1gb&?w5P
int mid = (l + r) / 2; QJE-$ :
if (l == r) N^ET qg
return; }-Ma~/
if ((mid - l) >= THRESHOLD) dDuA%V0
mergeSort(data, temp, l, mid); 6b8Klrar!
else uE|[7,D7;u
insertSort(data, l, mid - l + 1); -*Pt781
if ((r - mid) > THRESHOLD) eS=k 48'U
mergeSort(data, temp, mid + 1, r); ?7p| F^
else }n7e_qy4
insertSort(data, mid + 1, r - mid); i|O7nB@
<&Uk!1Jd
for (i = l; i <= mid; i++) { GJuD :
temp = data; [uY2Nh
} SWGa%6|
for (j = 1; j <= r - mid; j++) { j`GbI0,bT
temp[r - j + 1] = data[j + mid]; C}kJGi
} ppD~xg]
int a = temp[l]; A X#!9-m3
int b = temp[r]; F@lpjW
for (i = l, j = r, k = l; k <= r; k++) { UKBMGzu2:
if (a < b) { 1G;Ns] u
data[k] = temp[i++]; MGz> ,c^wW
a = temp; Jqj6L993e
} else { BT1'@qF
data[k] = temp[j--]; o'4@]ae
b = temp[j]; k$ M4NF~$
} B<&_lG0sS
} ,+BgY4OY
} &}$D[ 4N
/ IS WC
/** j)DZmGg&t
* @param data =arsoCa
* @param l MB 5[Js|
* @param i DQICD.X6R
*/ }\{1`$*~
private void insertSort(int[] data, int start, int len) { vTEkh0Ys
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %Tb|Yfyr C
} #G=QL(f>/
} {4 d$]o0V
} %Eh%mMb^
} u_"h/)C'H
1c"m$)a4
堆排序： 4w6K|v<X
Y fA\#N0;3
package org.rut.util.algorithm.support; X&~Eo
p4EItRZS
import org.rut.util.algorithm.SortUtil; NXNon*"
b . j^US^
/** mlWIq]J
* @author treeroot @/(7kh+
* @since 2006-2-2 N6[^62
* @version 1.0 .rm7Sd4K
*/ Umt ia~x=&
public class HeapSort implements SortUtil.Sort{ kAliCD)
')-(N um
/* (non-Javadoc) EM/+1 _u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]+dl=SmF
*/ t g*[%Jf^
public void sort(int[] data) { \>`$x:
MaxHeap h=new MaxHeap(); K-C,+eI
h.init(data); g0OS<,:
for(int i=0;i h.remove(); BZc-
System.arraycopy(h.queue,1,data,0,data.length); ]r1{%:8
} {kH^OZ^(e
JW[\"`x!
private static class MaxHeap{ ~&3"Mi&>`
8#u_+;,p
void init(int[] data){ U3K<@r
this.queue=new int[data.length+1]; h}>/Z3*
for(int i=0;i queue[++size]=data; =hOa 0X=
fixUp(size); ZC*d^n]x.
} 3a}`xCO5
} mZVOf~9E
51ebE`
private int size=0; U(=9&c@]
PjW+V`
private int[] queue; c\{}FGC
C'2 =0oou
public int get() { Pq>[q?>?
return queue[1]; ~+ wamX3
} g Pj0H&,.
hr6e1Er
public void remove() { (zDk68=v
SortUtil.swap(queue,1,size--); @h$0S+?:
fixDown(1); [(F<|f:n
} dd7nO :]
file://fixdown ]U1,NhZu
private void fixDown(int k) { 4`P2FnJ?
int j; O)JUY*&I5
while ((j = k << 1) <= size) { &E riskI
if (j < size %26amp;%26amp; queue[j] j++; ,wi=!KzX
if (queue[k]>queue[j]) file://不用交换 9PqgBq
break; U"Hquo
SortUtil.swap(queue,j,k); \u-e\w
k = j; PbHh?iH
} M .`
} K!c@aD:#
private void fixUp(int k) { |kNGpwpI
while (k > 1) { ls7A5 <
int j = k >> 1; U.7y8#qf3R
if (queue[j]>queue[k]) `N.$LY;8
break; {3(.c, q@
SortUtil.swap(queue,j,k); Z;~[@7`
k = j; 9Y%?)t.2
} zHOE.V2Qo
} 'b?.\Bm;
|z]2KjF&w-
} :t{vgi D9
)USC
} ]z=Vc#+!
?g;ZbD
SortUtil： pl,Z
n`z+ w*
package org.rut.util.algorithm; ^%%5
>-@ U_p
import org.rut.util.algorithm.support.BubbleSort; CCh8?sM
import org.rut.util.algorithm.support.HeapSort; Y0B1xL@
import org.rut.util.algorithm.support.ImprovedMergeSort; fTHun?Vn
import org.rut.util.algorithm.support.ImprovedQuickSort; YATdGLTeq
import org.rut.util.algorithm.support.InsertSort; 9N D+w6"
import org.rut.util.algorithm.support.MergeSort; 2ZG1n#
import org.rut.util.algorithm.support.QuickSort; _|
import org.rut.util.algorithm.support.SelectionSort; -+=:+LhSMb
import org.rut.util.algorithm.support.ShellSort; #H6g&)Z_
@fH&(@
/** c\MsVH2|
* @author treeroot A$%!9Cma
* @since 2006-2-2 CTkN8{2S
* @version 1.0 ki~y@@3I
*/ \}x'>6zr2
public class SortUtil { ff}a <w
public final static int INSERT = 1; +e8>?dkq
public final static int BUBBLE = 2; 3[=`uO0\7
public final static int SELECTION = 3; 6=,#9C9
public final static int SHELL = 4; CFJjh^ ~=
public final static int QUICK = 5; H[7cA9FI
public final static int IMPROVED_QUICK = 6; ~x4B/zW?
public final static int MERGE = 7; oCKM5AVWsv
public final static int IMPROVED_MERGE = 8; Hg9.<|+yo
public final static int HEAP = 9; <@e+-$
|[37:m
public static void sort(int[] data) { p + l_MB
sort(data, IMPROVED_QUICK); C. Ja;RFq
} O GFE*
private static String[] name={ ~`\9Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xe6_RO%
}; E!I
zzfn0g
private static Sort[] impl=new Sort[]{ 80$0zbw$
new InsertSort(), &6t3SZV
new BubbleSort(), =`1m-
new SelectionSort(), -N7xO)
new ShellSort(), !/nx=vgp
new QuickSort(), e*P=2*]M
new ImprovedQuickSort(), A}-&C
new MergeSort(), \POnsM)+l
new ImprovedMergeSort(), :G`L3E&1s
new HeapSort() ^b"bRQqm
}; 1O9p YW5J
qqe2,X?
public static String toString(int algorithm){ nQ642i%RQ
return name[algorithm-1]; !)%>AH'
} d=?Mj]
3Rd`Ysp
public static void sort(int[] data, int algorithm) { Jh\:X<q
impl[algorithm-1].sort(data); j6e}7
} 7rdw`
{x[;5TM
public static interface Sort { ("?&p3];b
public void sort(int[] data); ;V~rWzKM(
} kG$E tE#
'(*&Ax
public static void swap(int[] data, int i, int j) { jJUGZVM6)
int temp = data; &]VQR2J}:
data = data[j]; !{Q:(B#ec
data[j] = temp; {xv?wenE
} CQSpPQA
} -SvTg{Q{la