[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; @_U;9)
} ,%n\=
int i1=l; #?5 (o
int i2=mid+1; 8 ![|F:
for(int cur=l;cur<=r;cur++){ @*}D$}aR'V
if(i1==mid+1) -c(F1l
data[cur]=temp[i2++]; wDcj,:h`
else if(i2>r) vK 7^*qr;j
data[cur]=temp[i1++]; HqI t74+
else if(temp[i1] data[cur]=temp[i1++]; $>*3/H
else _Bj)r}~7#
data[cur]=temp[i2++]; pM x
} |B.0TdF
} EzDk}uKY0R
r9X?PA0f
} =2Bg9!zW>
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改进后的归并排序: >GQEqXs
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package org.rut.util.algorithm.support; Ks=>K(V6
h lkn%
import org.rut.util.algorithm.SortUtil; W;_nK4$%'
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/** |\QgX%
* @author treeroot T~QWRBO
* @since 2006-2-2 9!T[Z/}T
* @version 1.0 P6!jRC"52'
*/ X'%E\/~u
public class ImprovedMergeSort implements SortUtil.Sort { &L#UGp$,
+cIUGFp}
private static final int THRESHOLD = 10; /[O(ea$U
pcau}5 .
/* =jSb'Vu|
* (non-Javadoc) thV>j9'
* Em?d*z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JXCCTUO
*/ ~3WM5 fv
public void sort(int[] data) { 8dV=[+
int[] temp=new int[data.length]; y|CP;:f;
mergeSort(data,temp,0,data.length-1); EPS={w$'s
} :{qv~&+C
lCAIK
private void mergeSort(int[] data, int[] temp, int l, int r) { yMyE s8
int i, j, k; 7G.#O}).b
int mid = (l + r) / 2; ;w'D4p= P
if (l == r) `jzTmt
return; /b]oa!
if ((mid - l) >= THRESHOLD) bSsh^Z
mergeSort(data, temp, l, mid); *\=.<|HZ
else ~GTz:nC*
insertSort(data, l, mid - l + 1); u@~JiiC%
if ((r - mid) > THRESHOLD) n9@ of
mergeSort(data, temp, mid + 1, r); ELBa}h;
else ,z3{u162
insertSort(data, mid + 1, r - mid); b|cyjDMAA
20vXSYa~
for (i = l; i <= mid; i++) { g) p,5BADm
temp = data; (ohq0Y
} *F ?8c
for (j = 1; j <= r - mid; j++) { )E6;-rD0^+
temp[r - j + 1] = data[j + mid]; b`)){LR
} m_=$0m J$
int a = temp[l]; ^dP KDrKxh
int b = temp[r]; *:>"q ej
for (i = l, j = r, k = l; k <= r; k++) { mocI&=EF2X
if (a < b) { D@.tkzU@E
data[k] = temp[i++]; _u{c4U0,
a = temp; !O-C,uSm
} else { P8^hBv*
data[k] = temp[j--]; ?47@o1
b = temp[j]; qtiz a~u
} (7XCA,KTGI
} W5?yy>S6N
} Vy*:ne
Xv<B1
/** uwa~-xX6
* @param data vJ\pR~?
* @param l 0@G")L Ue0
* @param i b7!Qn}
*/ r`AuvwHPs[
private void insertSort(int[] data, int start, int len) { RE=`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2kdC]|H2?
} nA P.^_K
} t]$P1*I
} Eq$&qV-?(
} w4W_iaU
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堆排序： q-]`CW]n
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package org.rut.util.algorithm.support; _@ *+~9%8p
2WtRJi?b|
import org.rut.util.algorithm.SortUtil; F#5B<I
2P/K K
/** c6nflk.l
* @author treeroot tjGd )
* @since 2006-2-2 COTp
* @version 1.0 8<.C3m 6h
*/ F;gx%[$GX
public class HeapSort implements SortUtil.Sort{ JNkwEZhHyg
vhsk0$f
/* (non-Javadoc) A81ls#is
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U+)xu>I
*/ 3dht!7/
public void sort(int[] data) { _<a7CCg
MaxHeap h=new MaxHeap(); e=4+$d
h.init(data); oI}kH=<,
for(int i=0;i h.remove(); DA2}{
System.arraycopy(h.queue,1,data,0,data.length); UilMv~0
} R,9[hNHWGs
Row)hx8
private static class MaxHeap{ S+'rG+NJ
6U[4%(
void init(int[] data){ ;QW3CEaUq
this.queue=new int[data.length+1]; UlAzJO6"
for(int i=0;i queue[++size]=data; qZ}P*+`Q
fixUp(size); deM7fN4lTi
} aYuD>rD
} %z#f.Ql
= M]iIWQ@`
private int size=0; UB 6mqjPK
K'X2dG*
private int[] queue; A5i:x$ww
~zSCg|"r
public int get() { 5aln>1x>hn
return queue[1]; tZ`z
} _~q?_'kx
v^zu:Z*
public void remove() { oP!;\a( SL
SortUtil.swap(queue,1,size--); -O&CI)`;B
fixDown(1); E2cB U{x
} PH> b-n
file://fixdown Zs}5Smjl;%
private void fixDown(int k) { SB5&A_tr
int j; td4[[ /
while ((j = k << 1) <= size) { abJ" [
if (j < size %26amp;%26amp; queue[j] j++; ;5tazBy&:C
if (queue[k]>queue[j]) file://不用交换 zo[[>MA
break; ^|/](
SortUtil.swap(queue,j,k); W?eu!wL#p
k = j; }~"hC3w
} x_c7R;C
} %I-+Ead0i
private void fixUp(int k) { F B?UZ
while (k > 1) { ;Ra+=z}>
int j = k >> 1; _R.B[\r@
if (queue[j]>queue[k]) 8F:e|\SB#
break; HcedE3Rg
SortUtil.swap(queue,j,k); 6_d.Yfbq
k = j; wKi^C8Z2
} u1z
} mwY IJy[
J?Dq>%+^
} # eCjn
*P 3V
} `ORECg)
"=6v&G]U4
SortUtil： -s|}Rh?Y
w.lAQ5)I%\
package org.rut.util.algorithm; =xNv\e
^Ve<>b
import org.rut.util.algorithm.support.BubbleSort; esHQoIhd
import org.rut.util.algorithm.support.HeapSort; 0TmR/uUT
import org.rut.util.algorithm.support.ImprovedMergeSort; "Ae@lINn[y
import org.rut.util.algorithm.support.ImprovedQuickSort; 1~l I8
import org.rut.util.algorithm.support.InsertSort; >0dv+8Mn
import org.rut.util.algorithm.support.MergeSort; M/q E2L[y
import org.rut.util.algorithm.support.QuickSort; ^{xeij/
import org.rut.util.algorithm.support.SelectionSort; .[Ap=UYI>
import org.rut.util.algorithm.support.ShellSort; +=]!P#
Hewd4k
/** RPIyO
* @author treeroot ,SQZD,3v4
* @since 2006-2-2 YKbaf(K)9
* @version 1.0 P%#*-zCCx
*/ Vpr/
public class SortUtil { z81esXl
public final static int INSERT = 1; ZkIgL
public final static int BUBBLE = 2; f)g7 3=
public final static int SELECTION = 3; -AhwI
public final static int SHELL = 4; t\RF=BbJJ
public final static int QUICK = 5; B%KG3]
public final static int IMPROVED_QUICK = 6; 6<N5_1
public final static int MERGE = 7; rz"txN
public final static int IMPROVED_MERGE = 8; w|CZ7|6
public final static int HEAP = 9; sTOa
Qb!PRCHQ
public static void sort(int[] data) { N<QjdD&
sort(data, IMPROVED_QUICK); hzI|A~MFB
} A<6%r7&B'
private static String[] name={ q~@]W=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eeHP&1= 7
}; @xeAc0.^
iA0q_( \X
private static Sort[] impl=new Sort[]{ mo1oyQg8
new InsertSort(), nOQa_G]Gz
new BubbleSort(), zNY)'
new SelectionSort(), ?-tVSRKQ
new ShellSort(), ?KITC;\\
new QuickSort(), 4*aZ>R2hO
new ImprovedQuickSort(), 4J?t_)
new MergeSort(), Y3h/~bM%
new ImprovedMergeSort(), ]c&<zeX,
new HeapSort() 4GR!y)
}; {8R"O{
McoK@q;
public static String toString(int algorithm){ ,=aJVb=C
return name[algorithm-1]; ifo7%XPcg
} 5OO'v07b
4QIE8f Y
public static void sort(int[] data, int algorithm) { 557(EM
impl[algorithm-1].sort(data); wHIj<"2
} O:{U^K:*
DAwqo.m
public static interface Sort { gPu2G/Y
public void sort(int[] data); sHcTd>xS
} ]`bQW?
MWNPPYww
public static void swap(int[] data, int i, int j) { 11|Rdd+}
int temp = data; h(qQsxIOhS
data = data[j]; pDQ}*
data[j] = temp; lc_E!"1
} &QG6!`fK}3
} lpRR&