[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; C.uv0
} c@]G;>o
int i1=l; D2o|.e<r
int i2=mid+1; XD!}uDZ^
for(int cur=l;cur<=r;cur++){ ]-X\n
if(i1==mid+1) 5\JV}
data[cur]=temp[i2++]; y[cc<wm$
else if(i2>r) "k"+qR`fH
data[cur]=temp[i1++]; /s(PFN8#Y
else if(temp[i1] data[cur]=temp[i1++]; n2c(x\DA&
else Ha ZV7
data[cur]=temp[i2++]; Eoo[H2=^H
} jL3 *m
} 5mudww`
_E-{*,7bZS
} 6b` Jq>v
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改进后的归并排序: $j(4FyH\
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package org.rut.util.algorithm.support; fD_3lbiL(
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import org.rut.util.algorithm.SortUtil; TOqxl
p!Tac%D+k
/** Ft:_6T%
* @author treeroot :m'(8s8
* @since 2006-2-2 Bv*VNfUm
* @version 1.0 %%wngiz\
*/ nddCp~NX
public class ImprovedMergeSort implements SortUtil.Sort { 0T$`;~
\b)P4aL
private static final int THRESHOLD = 10; RJT55Rv{
l9y%@7
/* :G^4/A_
* (non-Javadoc) '}>8+vU`
* O7&OCo|b%>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vj#m#1\f
*/ \ sz](X
public void sort(int[] data) { s1%2({wP
int[] temp=new int[data.length]; l<"B[
mergeSort(data,temp,0,data.length-1); G[zysxd
} mkBQTQGT
QqeF
private void mergeSort(int[] data, int[] temp, int l, int r) { @k:@mzB7R
int i, j, k; &Dp&
int mid = (l + r) / 2; 9]{Ss$W3x
if (l == r) t[b(erO'
return; B(-F|q\
if ((mid - l) >= THRESHOLD) ~g~`,:Qc
mergeSort(data, temp, l, mid); 'P&r^V\~(/
else mII8jyg*c
insertSort(data, l, mid - l + 1); -/7@ A
if ((r - mid) > THRESHOLD) \IR$~
mergeSort(data, temp, mid + 1, r); fv>Jn`
else * _,yK-et
insertSort(data, mid + 1, r - mid); dftX$TS
`\BBdQ#bH
for (i = l; i <= mid; i++) { {+9t!'
temp = data; "JYWsE
} :c[T@[
for (j = 1; j <= r - mid; j++) { OXoEA a
temp[r - j + 1] = data[j + mid]; EScy!p\*
} f,-'eW/j
int a = temp[l]; cZt5;"xgr]
int b = temp[r]; Au )%w
for (i = l, j = r, k = l; k <= r; k++) { ,zBc-Cm
if (a < b) { d _=44( -
data[k] = temp[i++]; ydzvjp=
a = temp; cf_X=;yaqy
} else { qNkX:|j
data[k] = temp[j--]; {N-*eV9#
b = temp[j]; :3}K$
} R*vfp?x
} >4T7DMy
} MF::At[4
k@9q5lu;T
/** xtXK3[s
* @param data Zl2doXC
* @param l "1ZVuI
* @param i I?<ibLpX
*/ #Pq6q.UB
private void insertSort(int[] data, int start, int len) { t 9.iWIr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I]d?F:cdX
} &#]||T-
} 34vH+,!u
} -r{]9v2j
} lWU? R
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堆排序： Pv8AWQQJ
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package org.rut.util.algorithm.support; D4+OWbf6
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import org.rut.util.algorithm.SortUtil; vRO`hGH
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/** 4-xg+*()
* @author treeroot Cz4l
* @since 2006-2-2 M""X_~&I"
* @version 1.0 79M`?xm
*/ ^F/H?V/PX
public class HeapSort implements SortUtil.Sort{ ]G=^7O]`C!
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/* (non-Javadoc) sJLJVSv8c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qhn>aeW,
*/ {Hxziyv~Y(
public void sort(int[] data) { MCfDR#a
MaxHeap h=new MaxHeap(); js=w!q0)9
h.init(data); ns8I_H
for(int i=0;i h.remove(); rP&.`m88n
System.arraycopy(h.queue,1,data,0,data.length); N5fMMi(O
} E`3[62C
Z9PG7h
private static class MaxHeap{ ]<E\J+5K
k5GJrK+
void init(int[] data){ eN I6V/\`
this.queue=new int[data.length+1]; uacVF[9|W
for(int i=0;i queue[++size]=data; , @6_sl
fixUp(size); eZRu{`AF*
} ^(yU)k3pu
} .n| M5X
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private int size=0; a 1pa#WC
0o&7l%Y/
private int[] queue; q^kOyA.
Z<tJ+
public int get() { U_Va'7
return queue[1]; s$OnQc2/
} jQ?6I1o
ais"xm<V
public void remove() { r}])V[V
SortUtil.swap(queue,1,size--); 09rbu\h
fixDown(1); 5ayH5=(t
} mE_?E&T`|
file://fixdown Y[ toN9,
private void fixDown(int k) { d+Jj4OnP
int j; _n_|skG
while ((j = k << 1) <= size) { *H,vqs\}y
if (j < size %26amp;%26amp; queue[j] j++; *4F6U
if (queue[k]>queue[j]) file://不用交换 ,v+~vXO&\
break; Ce1^S[
SortUtil.swap(queue,j,k); ~!a~ -:#
k = j; 1-60gI1)
} (Y%pk76d
} hbv>Jjd
private void fixUp(int k) { w#M66=je_
while (k > 1) { F%pYnHr<
int j = k >> 1; bjEm=4FI;
if (queue[j]>queue[k]) aI:G(C?jm
break; %-eags~sUC
SortUtil.swap(queue,j,k); h*9s^`9)
k = j; 8n^v,s>
} _+hf.[""
} !B &%!06
qXJBLIG
} X!%CYmIRb
8Yq_6
} 3jB5F0^r1
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SortUtil： B&E qd
WM_wkvYl
package org.rut.util.algorithm; `w J^
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import org.rut.util.algorithm.support.BubbleSort; ({}JvSn1
import org.rut.util.algorithm.support.HeapSort; D> |R.{
import org.rut.util.algorithm.support.ImprovedMergeSort; 2Po e-=
import org.rut.util.algorithm.support.ImprovedQuickSort; rmOcA
import org.rut.util.algorithm.support.InsertSort; ir%?J&C+t
import org.rut.util.algorithm.support.MergeSort; #sK:q&/G`
import org.rut.util.algorithm.support.QuickSort; MwN.Ll
import org.rut.util.algorithm.support.SelectionSort; 3~7X2}qU
import org.rut.util.algorithm.support.ShellSort; t_PAXj
}x^q?;7xW
/** *0GR }k
* @author treeroot YVMwb@|
* @since 2006-2-2 Q$NT>d6Q
* @version 1.0 8MH ZWi
*/ V9tG2mLf>
public class SortUtil { +p:#$R)MW
public final static int INSERT = 1; I'M,p<B
public final static int BUBBLE = 2; B1GBQH$Ms
public final static int SELECTION = 3; qd=&*?
public final static int SHELL = 4; _{fh/{b1
public final static int QUICK = 5; M7|k"izv
public final static int IMPROVED_QUICK = 6; o+o'!)
public final static int MERGE = 7; ([y2x.kd
public final static int IMPROVED_MERGE = 8; $y\\?
public final static int HEAP = 9; u&HLdSHe
O(~74:#*
public static void sort(int[] data) { 06FBI?;|=
sort(data, IMPROVED_QUICK); ^Gc#D:zU
} .]_ (>^6
private static String[] name={ y my/`%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9%i|_c}
}; bnb:4?d]
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private static Sort[] impl=new Sort[]{ {=5Wi|
new InsertSort(), {G:dhi
new BubbleSort(), Sl,\<a
new SelectionSort(), WJp9io[GM
new ShellSort(), Z=P]UD
new QuickSort(), n2NxO0
new ImprovedQuickSort(), ev}lb+pr)_
new MergeSort(), }IM*Vsk
new ImprovedMergeSort(), &Ff#E?Y4|
new HeapSort() -RisZ-n*
}; MlDWK_y_&
$IZ02ZM$
public static String toString(int algorithm){ s bl>i
return name[algorithm-1]; \uT2)X( N
} R!mFMw"
v1s.j2T
public static void sort(int[] data, int algorithm) { hRU.^Fn#%
impl[algorithm-1].sort(data); D"x;/I
} >5rb4
\e89 >m
public static interface Sort { '<}N`PS#N
public void sort(int[] data); ws!pp\F
} .c+NsI9}
eXN\w]GE
public static void swap(int[] data, int i, int j) { N:"S/G>r ;
int temp = data; ?AMn>v
data = data[j]; N- !>\n
data[j] = temp; cPFs K*w
} avJ%J"j8z
} 4f)B@A-