[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; YD5mJ[1t"2
} os+]ct
int i1=l; }jNVR#D:
int i2=mid+1; :,'.b|Tl.b
for(int cur=l;cur<=r;cur++){ U a1Z,~ *
if(i1==mid+1) R~#&xfMd.
data[cur]=temp[i2++]; " _TAo
else if(i2>r) 2]tW&y_i
data[cur]=temp[i1++]; AxCFZf5
else if(temp[i1] data[cur]=temp[i1++]; asbFNJG{
else 4&B|rf
data[cur]=temp[i2++]; *+J`Yk7}
} O+~@S~
} \Oe8h#%
' KNg;
} 4}<[4]f?|
p.vxrk`c
改进后的归并排序: Oc/ i'
F[0w*i&u5
package org.rut.util.algorithm.support; v0%FG9Gk
SCq3Kh
import org.rut.util.algorithm.SortUtil; ZVCa0Km
D#X&gE
/** //^{u[lr
* @author treeroot Lo +H&-
* @since 2006-2-2 G-DOI
* @version 1.0 }wGy#!CSza
*/ ESkhCDU
public class ImprovedMergeSort implements SortUtil.Sort { NF_[q(k'
2K{)8;^
private static final int THRESHOLD = 10; +?0r%R%\
m$$sNPnT
/* j|y"Lcq
* (non-Javadoc) Kr%O}<"
* VQ4rEO=t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RM!VAFH
*/ WAb@d=H{+>
public void sort(int[] data) { }\EHZ
int[] temp=new int[data.length]; ^ }|$_
mergeSort(data,temp,0,data.length-1); Gg5>~"pb
} .[vYT.LE
9:*a9xT,
private void mergeSort(int[] data, int[] temp, int l, int r) { 28 ;x5m)N
int i, j, k; { b7%Zd3-
int mid = (l + r) / 2; lZD"7om
if (l == r) C)ebZ3
return; PtOYlZTe?
if ((mid - l) >= THRESHOLD) 9Ljd or
mergeSort(data, temp, l, mid); {Ytqs(`
else RG`eNRTQ%
insertSort(data, l, mid - l + 1); ?#u_x4==e
if ((r - mid) > THRESHOLD) kBrU%[0O
mergeSort(data, temp, mid + 1, r); H`jvT]
else ?L>}( {9
insertSort(data, mid + 1, r - mid); bHmn0fZ9
`q?@ Ob&
for (i = l; i <= mid; i++) { sq}uq![?M
temp = data; ]hY4 MS
} /#e-x|L
for (j = 1; j <= r - mid; j++) { bbFzmS1
temp[r - j + 1] = data[j + mid]; j`k:)
} 3}i(i0+
int a = temp[l]; |`@7G`x
int b = temp[r]; lD?]D&
for (i = l, j = r, k = l; k <= r; k++) { UphZRgT!N
if (a < b) { ":01M},RA
data[k] = temp[i++]; Yr 1k\q
a = temp; ?4lEHef
} else { WI\h@qSB
data[k] = temp[j--]; Hr=?_Un"
b = temp[j]; x7c#kU2A&Z
} #h2 qrX&+
} .&n;S';"
} ^xF-IA#ZeB
c4FU@^Vv
/** r?=3TAA
* @param data nbU?:=P
* @param l >2LlBLQ
* @param i Trml?zexD
*/ vOBXAF
private void insertSort(int[] data, int start, int len) { ^ V8?6E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wL" 2Cm
} >Gr,!yP
} RVa{%
} EdS7m,d
} Hr;\}
~{npG
堆排序： d{RMX<;G
1IZTo!xi
package org.rut.util.algorithm.support; BPC>
n,%/cUl
import org.rut.util.algorithm.SortUtil; 9lSs;zm{Q
Yj>ezFo
/** 8\e8$y3
* @author treeroot (^LR9 CW
* @since 2006-2-2 Y j*Y*LB~
* @version 1.0 v^(J+d_>
*/ 2I1CKA:7g
public class HeapSort implements SortUtil.Sort{ D? FWSv
uE,j$d
/* (non-Javadoc) "o$)z'q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k3r<']S^
*/ f5hf<R),A
public void sort(int[] data) { *^.OqbO[U
MaxHeap h=new MaxHeap(); fZrB!\Q
h.init(data); 5Q@4@b{C
for(int i=0;i h.remove(); Ia*T*qJu
System.arraycopy(h.queue,1,data,0,data.length); AR5)Uws
} N##- vV
(Ei} :6,}
private static class MaxHeap{ MD=!a5'
cW\Y1=Gv|
void init(int[] data){ &%`0&y
this.queue=new int[data.length+1]; m7m)BX%O
for(int i=0;i queue[++size]=data; p"=8{LrO
fixUp(size); .oxeo0@~
} z#{%[X2
} K{]\}7+
17B`
private int size=0; gYvT'72
_:?b-44
private int[] queue; jMQ7^(9-
#%SF2PB;
public int get() { $O^U"
return queue[1]; 6ragRS/'x
} G0pqiU6
A=pyaU`aE
public void remove() { TvwkeOS#}7
SortUtil.swap(queue,1,size--); .0#{?R,
fixDown(1); Yjp*T:6
} k= oCpXq^
file://fixdown s,;L6nX"
private void fixDown(int k) { WEk3 4crk
int j; ;q%V)4
while ((j = k << 1) <= size) { PgwNEwG
if (j < size %26amp;%26amp; queue[j] j++; Z^ }4bR]
if (queue[k]>queue[j]) file://不用交换 QF9$SCmv
break; :A]CD(
SortUtil.swap(queue,j,k); @y{ f>nm
k = j; wxo{gBq
} 3d*wZ9qz
} :N ]H"u9X
private void fixUp(int k) { E sx`UG|
while (k > 1) { $5Tjo T
int j = k >> 1; [HSN*LXe
if (queue[j]>queue[k]) JD{AwE@Ro
break; P/doNv}iG
SortUtil.swap(queue,j,k); zc%HBZ3p
k = j; F`JW&r\
} qJT|om LY
} -)Y[t Z^*`
Dh B*k<S
} H(F9&6}
&=hkB9 ;
} 7xjihl3
n%={!WD
SortUtil： [,|;rt\o>
`& }C*i"
package org.rut.util.algorithm; vON1\$bu`
XT~]pOE;D
import org.rut.util.algorithm.support.BubbleSort; ~mYCXfoc{
import org.rut.util.algorithm.support.HeapSort; 299uZz}Y
import org.rut.util.algorithm.support.ImprovedMergeSort; %n:ymc $}
import org.rut.util.algorithm.support.ImprovedQuickSort; "c0Nv8_G
import org.rut.util.algorithm.support.InsertSort; WS1$cAD2N
import org.rut.util.algorithm.support.MergeSort; 8VR! Y0`e
import org.rut.util.algorithm.support.QuickSort; hR%2[lBn!]
import org.rut.util.algorithm.support.SelectionSort; 3[}w#n1
import org.rut.util.algorithm.support.ShellSort; V.Qy4u7m
Xo~kB)|,
/** pQ9~^
* @author treeroot ^fxS=Qs+
* @since 2006-2-2 X(fT[A_2C
* @version 1.0 2)47$eu
*/ o&U/e\zy
public class SortUtil { $JZ}=\n7
public final static int INSERT = 1; !t+eJj
public final static int BUBBLE = 2; @c^g<
public final static int SELECTION = 3; <;':'sW
public final static int SHELL = 4; NM&R\GI
public final static int QUICK = 5; &xMQ
public final static int IMPROVED_QUICK = 6; o C#W
public final static int MERGE = 7; TM^.y Y
public final static int IMPROVED_MERGE = 8; +IPMI#n
public final static int HEAP = 9; >`u/#mrd
g,d'&r"JWt
public static void sort(int[] data) { b{hdEb
sort(data, IMPROVED_QUICK); i@hW" [A
} C{P:1ELYXH
private static String[] name={ W"ldQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $>!tpJw
}; \R (Yf!>
vN3uLz'<
private static Sort[] impl=new Sort[]{ [-'LJG Wb<
new InsertSort(), ^9A,j}>o-
new BubbleSort(), V"R,omh
new SelectionSort(), cHk ?$
new ShellSort(), c$52b4=a
new QuickSort(), cy!;;bB
new ImprovedQuickSort(), FG6mh,C!
new MergeSort(), ipn0WQG
new ImprovedMergeSort(), #x[3@zP.
new HeapSort() h$rk]UM/Q
}; w@&(=C
AG(Gtvw
public static String toString(int algorithm){ i+eDBg6
return name[algorithm-1]; +DA,|~k_
} sRDxa5<MD
4&+lc*
public static void sort(int[] data, int algorithm) { `/L D:R
impl[algorithm-1].sort(data); TwLQ;Q
} 7bC)Co#:
{ K*
public static interface Sort { 9>hK4&m^
public void sort(int[] data); TxXX}6
} m. "T3K
Nvj0MD{ X
public static void swap(int[] data, int i, int j) { rX@?~(^ML
int temp = data; Spt;m0W90
data = data[j]; +W[NgUrGJ
data[j] = temp; mr\C
} [3fmhc
} l~*D jr~