[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; P*qNRP%
} BIB>U W
int i1=l; [laL6
int i2=mid+1; WRU@i;l
for(int cur=l;cur<=r;cur++){ MjF.>4
if(i1==mid+1) t&?v9n"X
data[cur]=temp[i2++]; C">=2OO
else if(i2>r) =-B3vd:LF
data[cur]=temp[i1++]; :4L5@>b-
else if(temp[i1] data[cur]=temp[i1++]; ztxQv5=:,
else FlA$G3
data[cur]=temp[i2++]; 8aIf{(/k
} 0m| Gp
} xuH<=-O>ki
gQcr'[[a
} Qak@~b
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改进后的归并排序: 4)I/\
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package org.rut.util.algorithm.support; /dP8F
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import org.rut.util.algorithm.SortUtil; zR/p}Wu|!
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/** '[ddE!ta
* @author treeroot t>=y7n&q
* @since 2006-2-2 1V9X(uP
* @version 1.0 2b&;Y/z
*/ F~- S3p
public class ImprovedMergeSort implements SortUtil.Sort { Zp(P)Obs#
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private static final int THRESHOLD = 10; nN]vu
!A<XqzV]
/* ~!+h"%'t
* (non-Javadoc) QvQf@o
* u5)A+.v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y:``|*+
*/ g!|E!\p
public void sort(int[] data) { !JQ~r@j
int[] temp=new int[data.length]; ,/?V+3l
mergeSort(data,temp,0,data.length-1); ;s/b_RN
} BU?MRcHC
0FR%<u
private void mergeSort(int[] data, int[] temp, int l, int r) { I4p= ?Ds
int i, j, k; _e@qv;*
int mid = (l + r) / 2; T_B.p*\BM
if (l == r) vi.AzO
return; D]`B;aE>A*
if ((mid - l) >= THRESHOLD) O,,n
mergeSort(data, temp, l, mid); u2\qg;dP
else Jn[ K0GV
insertSort(data, l, mid - l + 1); 8'\,&f`Y
if ((r - mid) > THRESHOLD) x$b[m20
mergeSort(data, temp, mid + 1, r); XI(@O)
else h swMy
insertSort(data, mid + 1, r - mid); Tb6x@MorP
"._WdY[
for (i = l; i <= mid; i++) { *b l{F\
temp = data; I; }%k;v6
} "RX5] eJc\
for (j = 1; j <= r - mid; j++) { iOXP\:mPo
temp[r - j + 1] = data[j + mid]; $u.T1v
} |g^W @.P
int a = temp[l]; s!!t
int b = temp[r]; 9i[2z:4HJ
for (i = l, j = r, k = l; k <= r; k++) { /lok3J:
if (a < b) { Gqc6).tn
data[k] = temp[i++]; H+&w7ER
a = temp; BRLU&@G`1
} else { dw}3B8]
data[k] = temp[j--]; |]3);^0
b = temp[j]; -6Si
} j/IZm)\
} @Lv_\^2/}
} j1CD;9i)%
aJ_Eh(cF
/** M<m64{m1
* @param data R[-:-8
* @param l )Nd:PnA
* @param i \4X{\p<
*/ <RsKV$Je I
private void insertSort(int[] data, int start, int len) { X}FF4jE]D(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,#;ahwU~s
} IL"#TKKv
} E4ee_`p
} fy4JW,c
} bUB6B
rAdcMFW
堆排序： 7B2Og{P
'^Np<
package org.rut.util.algorithm.support; a~EEow;A
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import org.rut.util.algorithm.SortUtil; o=2`N2AL
*,*5sV
/** Y }d>%i+
* @author treeroot r+Cha%&D
* @since 2006-2-2 CfnCi_=[`
* @version 1.0 ne*aC_)bT
*/ O5%F-}(:
public class HeapSort implements SortUtil.Sort{ oh~Dbu=%
jC8BLyGE_
/* (non-Javadoc) 9'aR-tFun;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }}2hI`
*/ \$UU/\
public void sort(int[] data) { },ZL8l{
MaxHeap h=new MaxHeap(); TrAUu`?#
h.init(data); >n\Q[W
for(int i=0;i h.remove(); ;BvWU\!
System.arraycopy(h.queue,1,data,0,data.length); <7Lz<{jaJ
} b#^D8_9h
`<Nc Y*
private static class MaxHeap{ x;aZ&
3Ab$
void init(int[] data){ sB!A:
this.queue=new int[data.length+1]; htlWC>*
for(int i=0;i queue[++size]=data; 'z5 ;o:T
fixUp(size); 2*FZ@?X@r
} 3=I Q
} C@W0fz
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private int size=0; svgi!=
qeGOSGc_
private int[] queue; ~epkRO="
fE}}>
public int get() { h UDEjW@S
return queue[1]; PxY"{-iAM
} z [{%.kA
@@&;gWr;
public void remove() { $6Psq=|
SortUtil.swap(queue,1,size--); q[g^[~WM#
fixDown(1); Iqv 5lo .
} A;PV,2|X
file://fixdown _JoA=<O!
private void fixDown(int k) { Yuck]?#0
int j; 7T78S&g
while ((j = k << 1) <= size) { #=m5*}=
if (j < size %26amp;%26amp; queue[j] j++; hNfL /^w
if (queue[k]>queue[j]) file://不用交换 #+=afJ
break; T;7|d5][
SortUtil.swap(queue,j,k); 2x CGr>X
k = j; SOJHw6
} 35et+9
} C%h_!z":
private void fixUp(int k) { _uacpN/<|
while (k > 1) { @ZZ Lh=
int j = k >> 1; sj2+|>
if (queue[j]>queue[k]) mmti3Y
break; Fx2&ji6u
SortUtil.swap(queue,j,k); (>'d`^kjk
k = j; 6zSN?0c
} .v'8G)6g
} wu3ZSLY
>d|W>|8e
} K+H82$ #
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} 0'",4=c#V
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SortUtil： bcg)K`'N
uv4jbg}Z+3
package org.rut.util.algorithm; ~-x\E#(
$@X,J2&
import org.rut.util.algorithm.support.BubbleSort; q_)DY f7V}
import org.rut.util.algorithm.support.HeapSort; ?g2K&
import org.rut.util.algorithm.support.ImprovedMergeSort; +=v|kd
import org.rut.util.algorithm.support.ImprovedQuickSort; A2 rRYzN;
import org.rut.util.algorithm.support.InsertSort; B _ >|Mo/
import org.rut.util.algorithm.support.MergeSort; mJHX
import org.rut.util.algorithm.support.QuickSort; ]b)(=-;>
import org.rut.util.algorithm.support.SelectionSort; B Xp3u|t
import org.rut.util.algorithm.support.ShellSort; J2-xnUa]7
6AY%onY
/** L'(^[vR(
* @author treeroot D!CGbP(
* @since 2006-2-2 OXo-(HLE
* @version 1.0 wlJ_,wA
*/ W\/0&H\i
public class SortUtil { AkF3F^
public final static int INSERT = 1; *niQ*A
public final static int BUBBLE = 2; 5 ,HNb
public final static int SELECTION = 3; 1JY4E2Q
public final static int SHELL = 4; lB3X1e9
public final static int QUICK = 5; D UeT
public final static int IMPROVED_QUICK = 6; o3yZCz
public final static int MERGE = 7; Wl{Vz
public final static int IMPROVED_MERGE = 8; uPpP")
public final static int HEAP = 9; 6+>rf{5P7
;Ti?(n#M>
public static void sort(int[] data) { `|4{|X*U.
sort(data, IMPROVED_QUICK); 6FfDif
} q~Ud>{
private static String[] name={ #gq3 e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tpS F[W
}; BFY~::<b
R_csKj
private static Sort[] impl=new Sort[]{ 4)?c[aC4P
new InsertSort(), 'W)x<Iey1
new BubbleSort(), GY>0v
new SelectionSort(), mcvTz, ;=
new ShellSort(), 6%? NNEM
new QuickSort(), !eW<4jYB
new ImprovedQuickSort(), a2zo_h2R
new MergeSort(), %(i(ZW "
new ImprovedMergeSort(), ,QDq+93
new HeapSort() }-!$KR]:s
}; NEvt71k
}w$/x<Q[
public static String toString(int algorithm){ '(Pbz
return name[algorithm-1]; p^2pv{by
} XHV+Y+VG
1BF+sT3
public static void sort(int[] data, int algorithm) { 0kDT:3
impl[algorithm-1].sort(data); S5;q)qz2J
} db`<E <
K_xn>
public static interface Sort { CZ@M~Si_
public void sort(int[] data); oR~+s&c
} SngV<J>zR
Zhw _L
public static void swap(int[] data, int i, int j) { d(&vIjy
int temp = data; T]+*}C
data = data[j]; 6;VlX,,j
data[j] = temp; f!87JE=<
} 4h|D[Cb]
} R,(^fM