[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; q=c/B(II!
} 4I~i)EKy6
int i1=l; M]_E
int i2=mid+1; D5]{2z}k
for(int cur=l;cur<=r;cur++){ T-L5zu
if(i1==mid+1) d+2daKi
data[cur]=temp[i2++]; !e8i/!}^S
else if(i2>r) ;b~~s.+
data[cur]=temp[i1++]; B!,yfTk]
else if(temp[i1] data[cur]=temp[i1++]; L/r{xS
else vE\lp8j+
data[cur]=temp[i2++]; q(]f]Vl|0
} L'kq>1QWf
} r2eQ{u{nX
mBl7{w;Iv
} WR.x&m>
bkQ3c-C<
改进后的归并排序: mN1Ssq"B
n.$(}A
package org.rut.util.algorithm.support; ijZ>:B2:
*Zkss
import org.rut.util.algorithm.SortUtil; H~9=&p[Q
?b$3ob"
/** =Sxol>?t
* @author treeroot !Tfij(91
* @since 2006-2-2 1kFjas`g
* @version 1.0 [8]m8=n
*/ xPQL?.
public class ImprovedMergeSort implements SortUtil.Sort { R{3CW^1
bEpMaBN
private static final int THRESHOLD = 10; J/Q|uRpmqr
j7/(sf
/* l]5%
* (non-Javadoc) |-kEGLH[*V
* jxY-u+B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Ub}p[L
*/ U6{dI@|B
public void sort(int[] data) { 4;<DJ.XlN=
int[] temp=new int[data.length]; +WF.wP?y
mergeSort(data,temp,0,data.length-1); 0=[0|`x
} Y6eEGo"K.+
%W;u}`
private void mergeSort(int[] data, int[] temp, int l, int r) { k&GHu0z
int i, j, k; a!t V6H
int mid = (l + r) / 2; &'O?es|Lb
if (l == r) nFXAF!,jj
return; epVH.u%
if ((mid - l) >= THRESHOLD) YNM\pX'
mergeSort(data, temp, l, mid); @d)a~[pm
else oh&Y<d0
insertSort(data, l, mid - l + 1); 3?ba 1F0Nw
if ((r - mid) > THRESHOLD) G[6=u|(M
mergeSort(data, temp, mid + 1, r); yX9B97XyC
else < l[`"0
insertSort(data, mid + 1, r - mid); V\zsDP
`^%GN8d}nm
for (i = l; i <= mid; i++) { "6V_/u5M;=
temp = data; hEOJb @:R
} WEC-<fN|Y\
for (j = 1; j <= r - mid; j++) { ^Kw(&v
temp[r - j + 1] = data[j + mid]; /=M.-MU2
} A?Sm-#n{
int a = temp[l]; faVS2TN4
int b = temp[r]; s^PmnFR
for (i = l, j = r, k = l; k <= r; k++) { Y'_ D<Mp
if (a < b) { g{a d0.y,
data[k] = temp[i++]; {Gkn_h-^
a = temp; &7F&}7*c
} else { \X opU"
data[k] = temp[j--]; lIl9ypikg
b = temp[j]; 7.|S>+Q
} `Kp}s<
} s5.k|!K
} Wf1-"Q
-s~p}CQ.
/** '%Dg{ zL
* @param data ZOHRUm
* @param l yS"0/Rm}
* @param i g =\13#F
*/ J~2CD*v
private void insertSort(int[] data, int start, int len) { m){&:Hs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }rxFS <j
} M=Is9)y
} ddMM74
} p;ZDpR
} f[M"EMy
2$Y3[$
堆排序： %0(>!SY
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package org.rut.util.algorithm.support; HjPH
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import org.rut.util.algorithm.SortUtil; hGKdGu`0
+}]wLM}\UF
/** @}{VM)Fc+
* @author treeroot I)uASfT$
* @since 2006-2-2 Y;PDZbK3
* @version 1.0 5oa]dco
*/ }'_:XKLj
public class HeapSort implements SortUtil.Sort{ -(ER4#
h=mv9=x
/* (non-Javadoc) <on)"{W13
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZ&]
*/ OAyE/Q|
public void sort(int[] data) { ?(M\:`G'
MaxHeap h=new MaxHeap(); [M2Dy{dh
h.init(data); Ua!Odju*w
for(int i=0;i h.remove(); D2-O7e
System.arraycopy(h.queue,1,data,0,data.length); <v-92?
} "lb\c
6!o/~I#
private static class MaxHeap{ h@/>?Va
lZ+/\s,]|
void init(int[] data){ Jz2q\42q
this.queue=new int[data.length+1]; (BhL/A 4
for(int i=0;i queue[++size]=data; Ut=0~x.=<
fixUp(size); M,Po54u
} xKisL=l6Y
} <#!8?o&i
,P1G?,y
private int size=0; kfIbgya
JG1LS$p^
private int[] queue; _4A&%>
]n/jJ_[
public int get() { m';|}z'
return queue[1]; JCBnFrP
} 9Z}S]-u/
<C2c"=b
public void remove() { Xek E#?.
SortUtil.swap(queue,1,size--); m./*LXU
fixDown(1); %k~C-+
} (jt*u (C&Y
file://fixdown O/'f$Zj36
private void fixDown(int k) { Zr~"\llk
int j; fG^7@Jw:G
while ((j = k << 1) <= size) { I[vME"
if (j < size %26amp;%26amp; queue[j] j++; 7jD@Gp`" 3
if (queue[k]>queue[j]) file://不用交换 F\l!A'Q+t
break; ]oo|o1H87
SortUtil.swap(queue,j,k); H==X0
k = j; ook' u}h
} 8Na}Wp;|Gi
} <:H
private void fixUp(int k) { X@G[=Rs
while (k > 1) { ZO]E@?Oav
int j = k >> 1; | H5Ync[s
if (queue[j]>queue[k]) sVNo\
break; $4&8U~Zs
SortUtil.swap(queue,j,k); J#_\+G i
k = j; &7JEb]1C
} ">rsA&hN-
} XP3QBq
3" 8t)s
} F5Cqv0HV
%YsRm%q
} GWVEIZ
qsQ]M^@>
SortUtil： F\I5fNs@
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package org.rut.util.algorithm; GXGN;,7EV
dICnB:SSB
import org.rut.util.algorithm.support.BubbleSort; :ga 9Db9P
import org.rut.util.algorithm.support.HeapSort; 9iiU,}M`j
import org.rut.util.algorithm.support.ImprovedMergeSort; w?*'vF_2:#
import org.rut.util.algorithm.support.ImprovedQuickSort; 4"rb&$E
import org.rut.util.algorithm.support.InsertSort; 7 B4w.P,B
import org.rut.util.algorithm.support.MergeSort; %!1@aL]pQ
import org.rut.util.algorithm.support.QuickSort; ]M02>=1
import org.rut.util.algorithm.support.SelectionSort; z0FR33-
import org.rut.util.algorithm.support.ShellSort; L2do2_
1ZGQhjcx
/** mJU>f-l
* @author treeroot k|)^!BdO
* @since 2006-2-2 [j]}$fFe
* @version 1.0 U]1>?,Nk'3
*/ N GX-'w
public class SortUtil { b*9m2=6
public final static int INSERT = 1; :C}KI)
public final static int BUBBLE = 2; ~`a#h#
public final static int SELECTION = 3; h/fb<jIP1
public final static int SHELL = 4; $u(M 4(}
public final static int QUICK = 5; hPNQGVv
public final static int IMPROVED_QUICK = 6; _%C_uBLi
public final static int MERGE = 7; :K a^
public final static int IMPROVED_MERGE = 8; `"-`D!U?$
public final static int HEAP = 9; F='jmiVJ
Lcm~QF7cd
public static void sort(int[] data) { P W0q71
sort(data, IMPROVED_QUICK); w0F:%:/
} Rq~ >h99M
private static String[] name={ n:{-Vvt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6ba2^3GH
}; W,L>'$#pM
U/v"?pg[
private static Sort[] impl=new Sort[]{ Lk$Je O
new InsertSort(), S.?\>iH[
new BubbleSort(), |>m# m*{S
new SelectionSort(), !ds"88:5^
new ShellSort(), 1VPfa
new QuickSort(), :d:|7hlNQ
new ImprovedQuickSort(), Y:#kel<
new MergeSort(), ~`W6O>
new ImprovedMergeSort(), 3/#R9J#
new HeapSort() _AsHw
}; kfG65aa>_
[7ek;d;'t
public static String toString(int algorithm){ >8.v.;`
return name[algorithm-1]; ;8 /+wBnm
} +)''l
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public static void sort(int[] data, int algorithm) { h<!khWFS
impl[algorithm-1].sort(data); e2_r0I^C
} %$!R]B)
HquB*=^xh
public static interface Sort { n8y,{|
public void sort(int[] data); R-0_226
} 071E%u,
NC[GtAPD3
public static void swap(int[] data, int i, int j) { SFXfo1dqH
int temp = data; [f0oB$
data = data[j]; )e <! =S
data[j] = temp; r5fz6"
} :p*ojl|
} dcc%G7w