[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; m2|%AD
} 6 J B"qd
int i1=l; &uMx*TTY
int i2=mid+1; d)yu`U
for(int cur=l;cur<=r;cur++){ Vw>AD<Rl
if(i1==mid+1) [S<1|hk s(
data[cur]=temp[i2++]; >nqCUhS
else if(i2>r) iS]4F_|vd
data[cur]=temp[i1++]; gFQ\zOlY8a
else if(temp[i1] data[cur]=temp[i1++]; f}%paE"
else :Ou[LF.O
data[cur]=temp[i2++]; b:6NVHb%
} N3rq8Rk
} Q%*987i
d(X/N2~g
} HkL`- c0
vv FH (W
改进后的归并排序: aF!Im}
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package org.rut.util.algorithm.support; |@*3 nb8
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import org.rut.util.algorithm.SortUtil; wS"`~Ql_
2.>aL
/** M8{J
* @author treeroot yRyUOTK
* @since 2006-2-2 S8Ec.]T
* @version 1.0 9(AY7]6
*/ `$oy4lDKQ
public class ImprovedMergeSort implements SortUtil.Sort { p`I[3/$3
m*f"Y"B.1I
private static final int THRESHOLD = 10; N}\%r&KR=
o0}kRL
/* f]C`]qg
* (non-Javadoc) @yj$
* ,%X"Caz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LuE0Hb"S8
*/ h%UM<TZ]"
public void sort(int[] data) { qe<xH#6
int[] temp=new int[data.length]; >.o<}!FW
mergeSort(data,temp,0,data.length-1); W Yo>Md 8
} %5yP^BL0
s$D"
private void mergeSort(int[] data, int[] temp, int l, int r) { 5>!I6[{
int i, j, k; ^(+@uuBx
int mid = (l + r) / 2; ]*]#I?&'Hx
if (l == r) =!N,{V_
return; "969F(S$
if ((mid - l) >= THRESHOLD) ZTg[}+0e
mergeSort(data, temp, l, mid); bHK[Z5
else 9~5LKg7Ac
insertSort(data, l, mid - l + 1); Tf{lH9ca$
if ((r - mid) > THRESHOLD) F"| ;
mergeSort(data, temp, mid + 1, r); s^R$u"pFs
else LFX[v
insertSort(data, mid + 1, r - mid); f!K{f[aDa
9cXL4
for (i = l; i <= mid; i++) { UpSa7F:Uw
temp = data; 'Y22HVUX
} V M{Sng
for (j = 1; j <= r - mid; j++) { JKY
temp[r - j + 1] = data[j + mid]; lKBI3oYn
} ]MmFtdvE
int a = temp[l]; x,j%3/J^2
int b = temp[r]; 3S=$ng
for (i = l, j = r, k = l; k <= r; k++) { dthtWnB@
if (a < b) { 's\rQ-TV
data[k] = temp[i++]; %%+@s
a = temp; @>q4hYF
} else { -_^#7]
data[k] = temp[j--]; Y;1s=B9
b = temp[j]; u-u:7VtH0=
} ">v-CSHY
} o\N^Uu
} Egi(z9|Pp
9ePR6WS4
/** r*kz`cJ
* @param data ^~kfo|
* @param l R+5yyk\
* @param i pebNE3`#
*/ IO{iQ-Mg
private void insertSort(int[] data, int start, int len) { )CoJ9PO7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TdL/tg!
} 2v{42]XYf
} sB=s .`9
} C {G647
} ? ]H'egG6
X3j|J/
堆排序： [!j;jlh7},
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package org.rut.util.algorithm.support; Z5`U+ (
%*^s%NI
import org.rut.util.algorithm.SortUtil; @@5JuI-!
{`+:!X
/** nn8uFISb
* @author treeroot gg&Dej2{
* @since 2006-2-2 7e:7RAX
* @version 1.0 "Z#MR`;&29
*/ }_fVv{D
public class HeapSort implements SortUtil.Sort{ ,T8fo\a4
)(h<vo)-zX
/* (non-Javadoc) H)pB{W/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +:3p*x%1H
*/ )VeeAu)p
public void sort(int[] data) { L"'L@A|U
MaxHeap h=new MaxHeap(); EASN#VG
h.init(data); J:dNV<A^
for(int i=0;i h.remove(); |k<5yj4?
System.arraycopy(h.queue,1,data,0,data.length); (AT)w/
} kPYQcOK8
97n,^t2F\
private static class MaxHeap{ <ahcE1h
ZW ZKyJQ
void init(int[] data){ ^)1!TewCY
this.queue=new int[data.length+1]; 7 aN}lQM
for(int i=0;i queue[++size]=data; ar:qCq$\
fixUp(size); =`t%p1
} \ocC'FmE
} lTJM}K
U(\ ^!S1
private int size=0; n:[LsbTk
V&R_A~<T
private int[] queue; fvM|Jb
vqRW^>~-B
public int get() { e$4l[&kH_
return queue[1]; g.x]x#BC
} f/pr
K~14;
public void remove() { V3[>^ZCA
SortUtil.swap(queue,1,size--); x<>In"QV
fixDown(1); q&@q/9kz
} .xg, j{%(
file://fixdown {3G2-$yb
private void fixDown(int k) { }O8#4-E_Ji
int j; o%l|16DR
while ((j = k << 1) <= size) { ^w~Utx4
if (j < size %26amp;%26amp; queue[j] j++; ;mXw4_{
if (queue[k]>queue[j]) file://不用交换 |\/V1
break; !z_VwZ#,
SortUtil.swap(queue,j,k); PHqIfH[
k = j; J-Wphc!m
} 3ms{gZbw
} AjMx\'(C
private void fixUp(int k) { S*a_
while (k > 1) { IfpFsq:
int j = k >> 1; K ZQ `
if (queue[j]>queue[k]) ?OdJt
break; "kkZK=}Nv
SortUtil.swap(queue,j,k); ?Q/9aqHe;
k = j; 0 hS(9y40
} Jtl[9qe#]
} 8\rHSsP
pu5-=QN
} LYp=o8JW|
"hXB_73)V
} ]`}R,'P
3QD##Wr^
SortUtil： e]u3[ao
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package org.rut.util.algorithm; q/^&si
28d=-s=[
import org.rut.util.algorithm.support.BubbleSort; aDE)Nf}
import org.rut.util.algorithm.support.HeapSort; `"<tk1Kq"
import org.rut.util.algorithm.support.ImprovedMergeSort; ntEf-x<
import org.rut.util.algorithm.support.ImprovedQuickSort; UU2=W
import org.rut.util.algorithm.support.InsertSort; 5E}~iC&
import org.rut.util.algorithm.support.MergeSort; a*nx2d
import org.rut.util.algorithm.support.QuickSort; (ZHEPN
import org.rut.util.algorithm.support.SelectionSort; ?o.Q
import org.rut.util.algorithm.support.ShellSort; &#qy:
Zn"1qLPF
/** \!,qXfTMB
* @author treeroot 3NC-)S
* @since 2006-2-2 (f?&zQ!+
* @version 1.0 L\y>WR%s
*/ tJ@5E^'4
public class SortUtil { exL<cN
public final static int INSERT = 1; yXL]uh#b
public final static int BUBBLE = 2; PH3#\ v.
public final static int SELECTION = 3; 9|RR;k[
public final static int SHELL = 4; Mwd(?o
public final static int QUICK = 5; o;2QZ"v
public final static int IMPROVED_QUICK = 6; M}BqSzd*
public final static int MERGE = 7; FT.;}!"l
public final static int IMPROVED_MERGE = 8; Oj^qh+r
public final static int HEAP = 9; J,]U"+;H
5<KY}
public static void sort(int[] data) { rg{|/ ;imT
sort(data, IMPROVED_QUICK); |HMpVT-;j
} Z4@GcdZ
private static String[] name={ $r87]y!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E0a &1j
}; =)9@rV&~
8^%Nl `_2B
private static Sort[] impl=new Sort[]{ a5# B&|#q
new InsertSort(), '{xPdN
new BubbleSort(), $E]WU?U
new SelectionSort(), 7iBN!"G0
new ShellSort(), h$~\to$C
new QuickSort(), ?\NWKp
new ImprovedQuickSort(), #Jqa_$\.
new MergeSort(), Gw)>i45:
new ImprovedMergeSort(), [Oy5Td7[
new HeapSort() \%+5p"Z<
}; uRfFPOYH
dy^zOqc
public static String toString(int algorithm){ BR [3i}Ud
return name[algorithm-1]; c})f&Z@<
} wA;Cj
(5(TbyWwD
public static void sort(int[] data, int algorithm) { 9akIu.H
impl[algorithm-1].sort(data); _r&,n\ T
} X,"(G}KUA
mIX[HDy:V$
public static interface Sort { Xv'5%o^i*
public void sort(int[] data); "`4V^1
} I>(\B|\6
v8!Ts"
public static void swap(int[] data, int i, int j) { QBI;aG<+b>
int temp = data; ,aBo p#
data = data[j]; >=Pn\"j
data[j] = temp; :v>Nz7SB
} z<c%Xl\$%
} .V Cfh+*J#