[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; 78b9Sdi&
} =(k0^#++G
int i1=l; hU2N{Ac
int i2=mid+1; e8]mdU{)
for(int cur=l;cur<=r;cur++){ H~*[v"
if(i1==mid+1) &P8Q|A-u
data[cur]=temp[i2++]; x2f_>tu2
else if(i2>r) FUPJ&7+B
data[cur]=temp[i1++]; T5U(B3j_
else if(temp[i1] data[cur]=temp[i1++]; Z3T26Uk
else uqy~hY
data[cur]=temp[i2++]; D3 E!jQ1
} 2gjA>ET`N
} s{j3F
zwHTtE
} `Sj8<O}
naB[0I& N
改进后的归并排序: =WP}RZ{S
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package org.rut.util.algorithm.support; 2,%ne(
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import org.rut.util.algorithm.SortUtil; .^1=*j(;
b}G +7B
/** ]7"mt2Q=3
* @author treeroot 0P53dF
* @since 2006-2-2 BQ&h&57K
* @version 1.0 /L[:C=u
*/ 8|Y^z_C
public class ImprovedMergeSort implements SortUtil.Sort { ~yf5$~Z
MN)<Tr2f
private static final int THRESHOLD = 10; 1Kebl
veE8 N~0N.
/* 7,LT4wYH
* (non-Javadoc) Z#W`0G>'
* L,X6L @Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9k"nx ,"
*/ +~/zCJ;F
public void sort(int[] data) { \J\1i=a-=
int[] temp=new int[data.length]; CblL1q8
mergeSort(data,temp,0,data.length-1); f%auz4CZz
} m :^,qC
Ox43(S0~
private void mergeSort(int[] data, int[] temp, int l, int r) { qx? lCz a"
int i, j, k; en~(XE1
int mid = (l + r) / 2; eZJOI1wNp
if (l == r) i|d41u;@
return; X:g5>is|
if ((mid - l) >= THRESHOLD) y.oJzU[p%
mergeSort(data, temp, l, mid); MDCf(LhEH
else *'t`;m~
insertSort(data, l, mid - l + 1); }&naP
if ((r - mid) > THRESHOLD) KJkcmF}Q
mergeSort(data, temp, mid + 1, r); @',;/j80
else da^9Fb
insertSort(data, mid + 1, r - mid); ta4<d)nB
Vis?cuU/
for (i = l; i <= mid; i++) { E0h!%/+-L
temp = data; kI;^V
} WK^qYfq|
for (j = 1; j <= r - mid; j++) { 1!NaOfP;@
temp[r - j + 1] = data[j + mid]; dX3>j{_
} %E!0,y,:
int a = temp[l]; p_(hM&>C
int b = temp[r]; 5Np.&
for (i = l, j = r, k = l; k <= r; k++) { XZT( :(
if (a < b) { Wl2>U(lj
data[k] = temp[i++]; [E/3&3
a = temp; ?3, *
} else { ffhD+-gTU
data[k] = temp[j--]; nz&JG~Qfm
b = temp[j]; J/*[wj
} e O}mZN
} &\K#UVDyhh
} Bms?`7}N
wIiT :o
/** V)Xcn'h
* @param data zj)[Sntn?
* @param l DpR%s",Q
* @param i i!nl%%
*/ %?$"oWmenS
private void insertSort(int[] data, int start, int len) { JZ7-? o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nC Z
} Fy@D&j
} d$Xvax,C
} U\z+{]<<
} ?0<3"2Db~
t|DYz#]
堆排序： >y@w-,1he
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package org.rut.util.algorithm.support; ^YZ#P0 y
lqs_7HhvRS
import org.rut.util.algorithm.SortUtil; /4f;Niem
8|/YxF<
/** x/<.?[A
* @author treeroot C!P6Z10+j
* @since 2006-2-2 5-QXvw(TH
* @version 1.0 ~!OjdE!u
*/ U#P#YpD;==
public class HeapSort implements SortUtil.Sort{ "8X+F%
kgu+q\?
/* (non-Javadoc) "869n37
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M@3H]t?
*/ :U> oW97l
public void sort(int[] data) { XDGZqkt
MaxHeap h=new MaxHeap(); ]9:G3vq
h.init(data); '37b[~k4
for(int i=0;i h.remove(); :[&X*bw[
System.arraycopy(h.queue,1,data,0,data.length); /_|1,x-Kx
} ?~{xL"
^b#E%Rd
private static class MaxHeap{ (65p/$Vh
2S4z$(x3
void init(int[] data){ V_QVLW
this.queue=new int[data.length+1]; k|D!0^HE[
for(int i=0;i queue[++size]=data; VGq]id{*$
fixUp(size); %Z? o]
} 2P}RZvUd
} GXl?Zg
[`lAc V<
private int size=0; ;rKYWj>IR
AQ5v`xE4
private int[] queue; ao!r6:&v$e
5 $J
public int get() { @6SSk=9_S
return queue[1]; F8I<4S
} @n(In$
^q`*!B9@
public void remove() { Vmc)or*#
SortUtil.swap(queue,1,size--); ZJ(!jc$"*%
fixDown(1); aBnbu vp
} 11sW$@xs 9
file://fixdown $\ '\@3o
private void fixDown(int k) { G;;~xfE'
int j; 96avgyc
while ((j = k << 1) <= size) { luT8>9X^:a
if (j < size %26amp;%26amp; queue[j] j++; 86g+c
if (queue[k]>queue[j]) file://不用交换 c"ztrKQQ
break; 'Ap5Aq
SortUtil.swap(queue,j,k); \YS?}! 0
k = j; nz\fN?q
} <GN?J.B
} De_</1Au!2
private void fixUp(int k) { as4NvZ@+r
while (k > 1) { F?kVW[h?q
int j = k >> 1; @El<"\
if (queue[j]>queue[k]) *@nUas2"
break; ?s]`G'=>V`
SortUtil.swap(queue,j,k); JPG!cX%
k = j; [ UJj*n
} )QD}R36Ic
} `9l\~t(M
$ Zr,-
} ise}> A!t
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} MVdx5,t
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SortUtil： lijy?:__
cG:`Zj~4
package org.rut.util.algorithm; d ] ;pG(
)[*O^bPowI
import org.rut.util.algorithm.support.BubbleSort; \irjIXtV
import org.rut.util.algorithm.support.HeapSort; |5Pbc&mH8A
import org.rut.util.algorithm.support.ImprovedMergeSort; kVv <tw
import org.rut.util.algorithm.support.ImprovedQuickSort; xF;v 6d
import org.rut.util.algorithm.support.InsertSort; 1\0@?6`^
import org.rut.util.algorithm.support.MergeSort; !%r`'|9y
import org.rut.util.algorithm.support.QuickSort; 3~ZVAg[c
import org.rut.util.algorithm.support.SelectionSort; :F=nb+HZ
import org.rut.util.algorithm.support.ShellSort; H)Ge#=;ckQ
P;&p[[7
/** N~jQ!y
* @author treeroot p%1m&/`F
* @since 2006-2-2 [!mjUsut*
* @version 1.0 1.uQ(>n
*/ su;S)yZb
public class SortUtil { ;7k7/f:
public final static int INSERT = 1; >>zoG3H!
public final static int BUBBLE = 2; KCE-6T
public final static int SELECTION = 3; dAl<'~g
public final static int SHELL = 4; Zd ,=
public final static int QUICK = 5; V bOLTc
public final static int IMPROVED_QUICK = 6; RfG$Px '
public final static int MERGE = 7; 9AzGk=^
public final static int IMPROVED_MERGE = 8; ,r;d{
public final static int HEAP = 9; ]H~,K]@.
/H@")je
public static void sort(int[] data) { v!A|n3B]p
sort(data, IMPROVED_QUICK); wtS*w
} ,&]` b#Rc
private static String[] name={ gq3OCA!cX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GuvF
}; |LE++t*X~
0K0=Ob^(e
private static Sort[] impl=new Sort[]{ , % jTXb
new InsertSort(), oH0F9*+W
new BubbleSort(), 3G|fo4g
new SelectionSort(), Y26l,XIV
new ShellSort(), `0|&T;7
new QuickSort(), L$Ar]O)
new ImprovedQuickSort(), J6D$ i+
new MergeSort(), Ilb |:x"L
new ImprovedMergeSort(), Fjt,
new HeapSort() $ n[7
}; :-" jKw
"IJMvTmj
public static String toString(int algorithm){ MWh+h7k'
return name[algorithm-1]; qXhf?x
} _C=[bI@
>0#q!H,X
public static void sort(int[] data, int algorithm) { arVf"3a
impl[algorithm-1].sort(data); JBAK*g
} XYF~Q9~
hpV /F
public static interface Sort { }A/&]1GWk
public void sort(int[] data); 6F/ OlK<
} jYID44$
yc=#Jn?S
public static void swap(int[] data, int i, int j) { q<[ke
int temp = data; }IkEyJsk
data = data[j]; h_GBx|c
data[j] = temp; W;]UP$5l
} ./y[<e
} ]V^.!=gh$