[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; 53>(2 _/[r
} s1tkiX{>
int i1=l; 1jE {]/Y7&
int i2=mid+1; !x!1H5"
for(int cur=l;cur<=r;cur++){ bXA%|7*
if(i1==mid+1) K"ly\$F
data[cur]=temp[i2++]; @>&b&uj7T
else if(i2>r) /qFY$vj
data[cur]=temp[i1++]; p)VMYu
else if(temp[i1] data[cur]=temp[i1++]; E{}J-_oS45
else ^Jw=5ImG
data[cur]=temp[i2++]; r;p@T8k
} 9@}5FoX"
} gf}*}8D
^^< C9
} LW#U+bv]Dq
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改进后的归并排序: 8_pyfb
nJ$2RN
package org.rut.util.algorithm.support; TpI8mDO\W
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import org.rut.util.algorithm.SortUtil; {`-AIlH(
Hp5.F>-
/** -2'+GO7G
* @author treeroot CR;E*I${
* @since 2006-2-2 8l'W[6
* @version 1.0 q>wO=qWx
*/ e,d}4 jy
public class ImprovedMergeSort implements SortUtil.Sort { @|s$:;(=
HU$]o N
private static final int THRESHOLD = 10; }R%*J
5,-:31(j\
/* MNp4=R
* (non-Javadoc) 'Ydr_Ses
* JSID@ n<b?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *IIA"tC
*/ ju07gzz
public void sort(int[] data) { &%g$Bi,G
int[] temp=new int[data.length]; YT,yRV9#
mergeSort(data,temp,0,data.length-1); *rB@[(/
} 1K(mdL{m5
=yoR>llbBC
private void mergeSort(int[] data, int[] temp, int l, int r) { a8-V`
int i, j, k; /F46Ac}I
int mid = (l + r) / 2; <H{K&,Z(ZM
if (l == r) :*^aSPlV
return; A%x0'?GU
if ((mid - l) >= THRESHOLD) 8(\J~I[^
mergeSort(data, temp, l, mid); FA := )
else 947;6a%$
insertSort(data, l, mid - l + 1); :X:s'I4J D
if ((r - mid) > THRESHOLD) K;w2qc.+
mergeSort(data, temp, mid + 1, r); T8%!l40v
else EhW"s%Q
insertSort(data, mid + 1, r - mid); Lf%=vd
y#8 W1%{x
for (i = l; i <= mid; i++) { i`W~-J
temp = data; QcJC:sP\>
} C%{2 sMJz
for (j = 1; j <= r - mid; j++) { 78 ]Kv^l^_
temp[r - j + 1] = data[j + mid]; ;?q}98-2
} < Wp)Y
int a = temp[l]; \3"B$Sp|=
int b = temp[r]; Vw.)T/B_D
for (i = l, j = r, k = l; k <= r; k++) { GB"Orm.
if (a < b) { !"&-k:|g
data[k] = temp[i++]; 6RguUDRQ
a = temp; >P:U9 b
} else { q+2A>:|
data[k] = temp[j--]; fE_%,DJE(
b = temp[j]; pzaU'y#PM
} 2.=u '
} C`.eJF
} G e5Yz.Qv
l)~U8
/** 2`j{n\/
* @param data A{M7
* @param l iOSt=-p
* @param i gs=ok8w
*/ "C(yuVK1G
private void insertSort(int[] data, int start, int len) { ru6M9\h*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R MOs1<D
} VW*?(,#j{
} A?$-Uqb"
} kjB'WzZ8
} u;!h
bsr]Z&9rrk
堆排序： :I7mMy*
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package org.rut.util.algorithm.support; e+F$fQt>
i$`o,m#
import org.rut.util.algorithm.SortUtil; mBb3Ta
iH@u3[w
/** nnvS.s`O
* @author treeroot !]Qk?T~9-
* @since 2006-2-2 B~|]gd
* @version 1.0 R9Wr?
*/ J/:U,01
public class HeapSort implements SortUtil.Sort{ 'o4`GkNh)
"\T-r2
/* (non-Javadoc) RgJbM\`}?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q5JQx**g
*/ fA]sPh4Uag
public void sort(int[] data) { 43-Bx`6\
MaxHeap h=new MaxHeap(); c q[nqjC=
h.init(data); 9_F&G('V{a
for(int i=0;i h.remove(); BDzAmrO<
System.arraycopy(h.queue,1,data,0,data.length); J\w4N",
} pZlt4
4nP4F+
private static class MaxHeap{ 9nY|S{L
QBH|pr
void init(int[] data){ D&I/Tbc
this.queue=new int[data.length+1]; 0l& '`
for(int i=0;i queue[++size]=data; 4o;;'P
fixUp(size); 5c(g7N
} F$jy~W_
} 2boyBz}=S
/;/:>c
private int size=0; 9N{?J"ido
%&VI-7+K
private int[] queue; (n~fe-?}8
Y\WVkd(+G
public int get() { lY(_e#
return queue[1]; >ov#\
} *?~"Jw
n7G`b'
public void remove() { s$qc&
SortUtil.swap(queue,1,size--); q :~/2<o
fixDown(1); je2"D7D
} K]Vp! G
file://fixdown .0RQbc9
private void fixDown(int k) { W)J5[p?
int j; P0(LdZH6u
while ((j = k << 1) <= size) { @1&"S7@}u
if (j < size %26amp;%26amp; queue[j] j++; ?u?mSO/
if (queue[k]>queue[j]) file://不用交换 iAk.pH]a
break; m;hp1VO)
SortUtil.swap(queue,j,k); &+A78I
k = j; ks6iy}f7
} n1JV)4Mv
} %72(gR2Wa2
private void fixUp(int k) { 8>LDo"<
while (k > 1) { 3**t'iWQ
int j = k >> 1; G4~@
if (queue[j]>queue[k]) U1Fo #L
break; >i >|]
SortUtil.swap(queue,j,k); 8#tuB8>
k = j; oF]]Pl{W
} _yR_u+5
} ;|oft-y
oqysfLJ
} q+oc^FD?@
8!!h6dQgI
} )*XWe|H_
?PTXgIC
SortUtil： ILl~f\xG)
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package org.rut.util.algorithm; .{ljhE:
,ayJgAD
import org.rut.util.algorithm.support.BubbleSort; 2gkN\w6zQ
import org.rut.util.algorithm.support.HeapSort; r-!Qw1
import org.rut.util.algorithm.support.ImprovedMergeSort; ^2 H-_
import org.rut.util.algorithm.support.ImprovedQuickSort; #.*&#w)
import org.rut.util.algorithm.support.InsertSort; $ (xdF
import org.rut.util.algorithm.support.MergeSort; c/^jD5U7
import org.rut.util.algorithm.support.QuickSort; $RRX-
import org.rut.util.algorithm.support.SelectionSort; }N(gP_?n
import org.rut.util.algorithm.support.ShellSort; RPf<-J:t
1 hFh F^
/** |ka/5o
* @author treeroot 1W\wIj.
* @since 2006-2-2 ^VG].6
* @version 1.0 dR< d7
*/ |39,n~"o&
public class SortUtil { -P|claO0
public final static int INSERT = 1; W^xO/xu1/
public final static int BUBBLE = 2; [xrsa!$
public final static int SELECTION = 3; ^xNzppz`]C
public final static int SHELL = 4; 3h=kn@I
public final static int QUICK = 5; yhbU;qEG9
public final static int IMPROVED_QUICK = 6; Jq(;BJ90R
public final static int MERGE = 7; 5Rs#{9YE
public final static int IMPROVED_MERGE = 8; N[\J#x!U
public final static int HEAP = 9; $57Q g1v
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public static void sort(int[] data) { qwJp&6
sort(data, IMPROVED_QUICK); v{ohrpb0v
} (7b9irL&cn
private static String[] name={ {'h&[f>zcQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v&/H6r#E.
}; :7"Q
;zo|. YD
private static Sort[] impl=new Sort[]{ Sa9VwVUE
new InsertSort(), nh@JGy*L
new BubbleSort(), 0x5Ax=ut
new SelectionSort(), j\bp#+
new ShellSort(), 46e?%0(
new QuickSort(), G,$nq4
new ImprovedQuickSort(), b-#{O=B
new MergeSort(), N*$GP3]
new ImprovedMergeSort(), .uS`RS8JM
new HeapSort() uI?Z_
}; sU*?H`U3d
:*|Ua%L_
public static String toString(int algorithm){ 4TPdq&';C:
return name[algorithm-1]; Op]*wwI*h
} n~\; +U
5XHejHn>
public static void sort(int[] data, int algorithm) { =j- ,yxBvJ
impl[algorithm-1].sort(data); u<fZ.1
} >K,QP<B
^W:a7cMw
public static interface Sort { : Bo
public void sort(int[] data); xxl|j$m
} ~MH^R1=]
L8h!%56s
public static void swap(int[] data, int i, int j) { )~R[aXkvY
int temp = data; Cx/J_Ro#
data = data[j]; R?:Q=7K
data[j] = temp; c;X,-Q9
} (2>q
} vWESu4W`L