[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 2jF}n*[OW
} 8ByNaXMO6
int i1=l; u<JkP <"S
int i2=mid+1; x~QZVL=:
for(int cur=l;cur<=r;cur++){ ntQW+!s;P
if(i1==mid+1) /:@)De(S
data[cur]=temp[i2++]; 6~OJB!
else if(i2>r) kgHZaQnD
data[cur]=temp[i1++]; ?kULR0uL+
else if(temp[i1] data[cur]=temp[i1++]; W3gHzT?{
else H=*lj.x
data[cur]=temp[i2++]; O>"T*
} ~"VM_Lz]5
} ue1g(;
n0QHrIf{
} b!<)x}-t>
JAX`iQd
改进后的归并排序: \h/)un5
fTt\@"V
package org.rut.util.algorithm.support; &NX7
Qp9QSyMs}
import org.rut.util.algorithm.SortUtil; 8ZCR9%
b}&.IJ&40j
/** eD|"?@cE
* @author treeroot !u;gGgQF
* @since 2006-2-2 MZ?+I~@
* @version 1.0 TVF:z_M9
*/ Vn65:" O
public class ImprovedMergeSort implements SortUtil.Sort { M(1cf(<+
n_(f"Uv
private static final int THRESHOLD = 10; hkOFPt&
y3':x[d
/* _jb&=f8
* (non-Javadoc) "R\D:Olb#
* ,3 [FD9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t?H sfN
*/ mNlbiB
public void sort(int[] data) { 7LB%7~{<
int[] temp=new int[data.length]; @KRia{
mergeSort(data,temp,0,data.length-1); `CRF E5
} {:#c1d2@8
j\HZ5
private void mergeSort(int[] data, int[] temp, int l, int r) { #^tnRfS"
int i, j, k; %]1te*_
int mid = (l + r) / 2; |]~],
if (l == r) |\xTcS|d
return; Aho-\9/x%
if ((mid - l) >= THRESHOLD) mV0u:ws
mergeSort(data, temp, l, mid); 7x]q>Y8T
else -jzoGzC3
insertSort(data, l, mid - l + 1); U]W"
if ((r - mid) > THRESHOLD) {55f{5y3 c
mergeSort(data, temp, mid + 1, r); H<tU[U=G
else "xNP"S
insertSort(data, mid + 1, r - mid); i91k0q*di
TR%8O;
for (i = l; i <= mid; i++) { 7m%[$X`
temp = data; BMtk/r/
} &dPI<HlM
for (j = 1; j <= r - mid; j++) { N8DouDq
temp[r - j + 1] = data[j + mid]; d@tf+_Ih
} A"1%E.1
int a = temp[l]; .7M.bpmqE
int b = temp[r]; SkmKf~v
for (i = l, j = r, k = l; k <= r; k++) { *zMt/d*<&
if (a < b) { Jpc%i8
data[k] = temp[i++]; /A+5q\8G
a = temp; /Ny#+$cfk
} else { hj\A-Yf
data[k] = temp[j--]; bYmk5fpRG
b = temp[j]; &fsk ESV0
} wD/jN:
} Dw>)\\n{Kl
} QQ=Kj%R
<\$?.tTZ{
/** &Xc=PQ:I
* @param data IgRi(q^b-
* @param l P4LiU2C
* @param i bM2x (E\O
*/ 7{]L{j-
private void insertSort(int[] data, int start, int len) { MEM(uBYKOb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fCZ"0P3(
} ,J=lHj
} l;$FR4}d
} f\r"7j
} =:t<!dp
noLr185
堆排序： }57Jn5&'
b|*+!v:I>T
package org.rut.util.algorithm.support; aPRMpY-YC3
/ U!xh3
import org.rut.util.algorithm.SortUtil; KE~.f(
2`rJr
/** omznSL
* @author treeroot 'V8o["P
* @since 2006-2-2 0+[3>Ny0
* @version 1.0 `l6OQdB3W
*/ 0~P]Fw^w
public class HeapSort implements SortUtil.Sort{ ;mg.} fI
FLZ9Rg
/* (non-Javadoc) s:cJF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #K*p1}rf
*/ pNZ3vTs6
public void sort(int[] data) { ^=a:{["@!
MaxHeap h=new MaxHeap(); A-d<[@d0
h.init(data); Z78i7k}
for(int i=0;i h.remove(); Sy]W4%
System.arraycopy(h.queue,1,data,0,data.length); wn|;Li
} H/k]u)Gtv
Y]^*mc0fE
private static class MaxHeap{ FS!9 j8
_z1Qr?cY
void init(int[] data){ 7IQaXcl
this.queue=new int[data.length+1]; 'T(Q
for(int i=0;i queue[++size]=data; |onLJY7)
fixUp(size); {NcJL< ;tS
} VbTX;?
} |`pBI0Sjo
<WnIJum
private int size=0; X]n`YF7
xAO\'#m
private int[] queue; df {\O*6
Ujqnl>l
public int get() { /Dyig
return queue[1]; \Ui8gDJ8y5
} )T?BO
,7 m33Pv*
public void remove() { _\8E/4zh
SortUtil.swap(queue,1,size--); -SLk8x
fixDown(1); _zzT[}
} ,L<x=Dg
file://fixdown G(wstHT;/
private void fixDown(int k) { 2Dt^W.!
int j; N"tX K
while ((j = k << 1) <= size) { DZ4gp
if (j < size %26amp;%26amp; queue[j] j++; 9Y2.ob!$}
if (queue[k]>queue[j]) file://不用交换 D=Nt0y
break; x>,wmk5)
SortUtil.swap(queue,j,k); dcTZL$
k = j; #xq3)B
} XH0o8\.
} y|i(~
private void fixUp(int k) { r_FI5f
while (k > 1) { u~VXe
int j = k >> 1; MmU`i ,z
if (queue[j]>queue[k]) Hyenn
break; ,Z :2ba
SortUtil.swap(queue,j,k); eD3\>Y.z
k = j; C3N1t
} YMy**
} W#kyD)(F
iQ1[60?)T
} Z0O0Q=e\Y
VC_F Cz
} =v!Z8zk=W
8kr$w$=q
SortUtil： 9$qw&j[
[6 "5
package org.rut.util.algorithm; HRQfT>"/
+fKV/tSWi
import org.rut.util.algorithm.support.BubbleSort; ;8 *"c
import org.rut.util.algorithm.support.HeapSort; ;CoD5F!
import org.rut.util.algorithm.support.ImprovedMergeSort; T00sYoK
import org.rut.util.algorithm.support.ImprovedQuickSort; ~IPATG
import org.rut.util.algorithm.support.InsertSort; U%Hcck'
import org.rut.util.algorithm.support.MergeSort; nv7)X2jja
import org.rut.util.algorithm.support.QuickSort; }sJ}c}b
import org.rut.util.algorithm.support.SelectionSort; :Ig9n:
import org.rut.util.algorithm.support.ShellSort; YHke^Ind
(CtRU
/** *a0#PfS[
* @author treeroot aIr"!. 4
* @since 2006-2-2 Sn 7h$
* @version 1.0 K6)IBV;
*/ I>w|80%%
public class SortUtil { 'vZy-qHrV
public final static int INSERT = 1; EZVgTySd
public final static int BUBBLE = 2; p2fzbBt
public final static int SELECTION = 3; t$p%UyVE
public final static int SHELL = 4; F9tWJJUsr
public final static int QUICK = 5; 53.jx38xS
public final static int IMPROVED_QUICK = 6; #6mw CA|
public final static int MERGE = 7; =h?%<2t9<
public final static int IMPROVED_MERGE = 8; C OL"/3r
public final static int HEAP = 9; Fi7~JZZ
R<hsG%BS(D
public static void sort(int[] data) { X+ybgB4(
sort(data, IMPROVED_QUICK); cG3tn&AXi
} 09 f;z
private static String[] name={ MSp)Jc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tu@-+<*
}; N6T
!}c\u
private static Sort[] impl=new Sort[]{ cRCji^,KJ
new InsertSort(), "(~fl<;
new BubbleSort(), OwgPgrV
new SelectionSort(), !\$4A,
new ShellSort(), \{Je!#
new QuickSort(), Lm.N {NV'
new ImprovedQuickSort(), ;*U&lT
new MergeSort(), V`i(vC(
new ImprovedMergeSort(), Zs;c0T">
new HeapSort() 7TU77
}; 9"/=D9o9
\l# H#~
public static String toString(int algorithm){ %m/5! "
return name[algorithm-1]; {A%&D^o)
} Xi+l1xe
.)1u0 (?
public static void sort(int[] data, int algorithm) { {}gL*2:EW$
impl[algorithm-1].sort(data); *IF~ab2
} V' i@N
<h<_''+
public static interface Sort { !+YSc&R_fW
public void sort(int[] data); 1gvh6eE F
} hh.`Yu L
LW/> %
public static void swap(int[] data, int i, int j) { ]n'.}"8Kn
int temp = data; +(w9! 5?F
data = data[j]; 5-'Z.[ImB?
data[j] = temp; ?i!d00X
} >>;He7
} >m=XqtP