[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; w4<u@L
} qdkTg:QJ,
int i1=l; 6!}m$Dvt~
int i2=mid+1; ETH#IM8J
for(int cur=l;cur<=r;cur++){ sJYKt
if(i1==mid+1) BGh8\2
data[cur]=temp[i2++]; WX[dM }L
else if(i2>r) 1WA""yb
data[cur]=temp[i1++]; EK-bvZ
else if(temp[i1] data[cur]=temp[i1++]; l`5}i|4KTW
else o y%g{,V
data[cur]=temp[i2++]; Q&U= jX
} n.H`1@
} i]^*J1a
:R|2z`b!
} r<f-v_bxF
I+4qu|0lA
改进后的归并排序: *i]Z=
n4d(`
package org.rut.util.algorithm.support; XGrxzO|{
3z/O`z
import org.rut.util.algorithm.SortUtil; ?'$. -z:
N(({2'Rr
/** +[l{C+p
* @author treeroot I}Gl*@K&O
* @since 2006-2-2 Om?:X!l"
* @version 1.0 0,D9\ Ebd
*/ ?k7/`gU
public class ImprovedMergeSort implements SortUtil.Sort { 1 FIiX
=ILo`Q~
private static final int THRESHOLD = 10; xzf)_ <
]I*#R9
/* |sZ9/G7
* (non-Javadoc) #<V'gE
* 5bqYi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4#Nd;gM2
*/ {Z~VO
public void sort(int[] data) { 9787uj]Y}H
int[] temp=new int[data.length]; V{aIhH>P
mergeSort(data,temp,0,data.length-1); }y=n#%|i.
} P@T $6%~
I8pxo7(-
private void mergeSort(int[] data, int[] temp, int l, int r) { o _,$`nEJ
int i, j, k; r Xk
int mid = (l + r) / 2; :w`i
if (l == r) 8#JyK+NU
return; `9"jHw`D
if ((mid - l) >= THRESHOLD) M+&eh*:z:
mergeSort(data, temp, l, mid); +w}%gps
else (S93 %ii
insertSort(data, l, mid - l + 1); Z YO/'YW
if ((r - mid) > THRESHOLD) _q!ck0_
mergeSort(data, temp, mid + 1, r); B(vz$QE,$r
else %$-3fj7
insertSort(data, mid + 1, r - mid); MS^hsUj}
F9G$$%Q-Z
for (i = l; i <= mid; i++) { [~r$US
temp = data; nv|y@!(
} <h>fip3o
for (j = 1; j <= r - mid; j++) { JC?V].) y5
temp[r - j + 1] = data[j + mid]; W;xLuKIG
} kd2'-9
int a = temp[l]; @P*P8v8:
int b = temp[r]; ).#D:eO[~
for (i = l, j = r, k = l; k <= r; k++) { R8Ei:f}
if (a < b) { ;og<eK
data[k] = temp[i++]; n#AH@`&i
a = temp; Vh-h{
} else { )t 7HioQ
data[k] = temp[j--]; I Y-5/
b = temp[j]; #2t\>7]
} V\lF:3C
} JG+o~tQC
} Gqu0M`+7
oM7-1O
/** o+23?A~+
* @param data YO4ppL~xe
* @param l f2K3*}P
* @param i w9?wy#YI
*/ "Q!{8 9Y
private void insertSort(int[] data, int start, int len) { +?eAaC7s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :r+ 1>F$o
} {y%O_-C'r
} W${sD|d-
} BHBR_7
} n6+MqN
JZ0+VB-3U
堆排序： !Dn1pjxc
|&*rSp2iH
package org.rut.util.algorithm.support; _5 -"<
e/~<\
import org.rut.util.algorithm.SortUtil; wA+4:CF@
yq^$H^_O p
/** ^*>no=A
* @author treeroot [9Hm][|Ph
* @since 2006-2-2 fC:\Gh5
* @version 1.0 f*f9:xUY
*/ 5 `mVe0uI
public class HeapSort implements SortUtil.Sort{ i; uM!d}
zT40,rk
/* (non-Javadoc) \}(-9dr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )u:8Pv
*/ F#9KMu<<cI
public void sort(int[] data) { l@9:VhU(
MaxHeap h=new MaxHeap(); 4SO{cst
h.init(data); SQCuY<mD
for(int i=0;i h.remove(); E0'6!9y
System.arraycopy(h.queue,1,data,0,data.length); ::t!W7W
} PU\q.y0R
rMx_ <tXX
private static class MaxHeap{ AYtcN4\/
nsn,8a38
void init(int[] data){ eNKdub
this.queue=new int[data.length+1]; ~0t'+.
for(int i=0;i queue[++size]=data; jDR\#cGrZ
fixUp(size); 35\0g&
} ?|F;x"
} 3Q6#m3AWY
_dY}86{
private int size=0; pfIvBU?
KWkT 9[H
private int[] queue; ~#xRoBy3
RozsRt;i
public int get() { S!c@6&XJm?
return queue[1]; <0MUn#7'
} P,], N)
D{}\7qe
public void remove() { eS+LFS7*k
SortUtil.swap(queue,1,size--); =swcmab;
fixDown(1); Lf<9GYNy>`
} $t?e=#G
file://fixdown N($]))~3&
private void fixDown(int k) { =sJHnWL[
int j; [C#pMLp,~
while ((j = k << 1) <= size) { =1uI >[aN
if (j < size %26amp;%26amp; queue[j] j++; Np)!23 "
if (queue[k]>queue[j]) file://不用交换 {RO=4ba{J
break; w/@%xy
SortUtil.swap(queue,j,k); n[7zK'%Dxg
k = j; YLr2j 7
} ^u<+tV
} XP1_{\
private void fixUp(int k) { r-uIFhV^
while (k > 1) { 9tgkAU`
int j = k >> 1; !r,drb
if (queue[j]>queue[k]) qdZYaS ~
break; my0->W%L
SortUtil.swap(queue,j,k); Tj#XsD?J
k = j; <;K/Yv'{r
} n*uZ=M_/Q
} Melc-[
suSIz 7:
} !Hg#c!eOg
1+#8} z:
} yLX\pkAt4
|0 VP^md
SortUtil： {,X(fJ
sa?;D
package org.rut.util.algorithm; %stktVDAP
wm4e:&
import org.rut.util.algorithm.support.BubbleSort; .YlM'E*X
import org.rut.util.algorithm.support.HeapSort; K ajyQ"j
import org.rut.util.algorithm.support.ImprovedMergeSort; U9s y]7
import org.rut.util.algorithm.support.ImprovedQuickSort; S]a$w5ZP
import org.rut.util.algorithm.support.InsertSort; )}8%Gs4C
import org.rut.util.algorithm.support.MergeSort; _JXE/
import org.rut.util.algorithm.support.QuickSort; CSs6Vm!=
import org.rut.util.algorithm.support.SelectionSort; YKk%;U*
import org.rut.util.algorithm.support.ShellSort; $P~a
NI)nf;C
/** i=UJ*c
* @author treeroot }mK_d9dx
* @since 2006-2-2 4#uoPkLK
* @version 1.0 o%iTYR:x
*/ G[ea@u$?
public class SortUtil { /cn_|DwN5
public final static int INSERT = 1; |@F<ajlV
public final static int BUBBLE = 2; Y_B(R
public final static int SELECTION = 3; j.*}W4`Q_
public final static int SHELL = 4; \~>#<@h
public final static int QUICK = 5; UK/k?0
public final static int IMPROVED_QUICK = 6; C09@2M'
public final static int MERGE = 7; d0d2QRX
public final static int IMPROVED_MERGE = 8; YVi]f2F%
public final static int HEAP = 9; NgKNT}JDv
o=}?aC3I
public static void sort(int[] data) { ho. a93
sort(data, IMPROVED_QUICK); :csLZqn[
} {s]eXc]K}
private static String[] name={ gB#t"s)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :KwYuwYS
}; i|e-N?l
g=wnly
private static Sort[] impl=new Sort[]{ LvaF4Y2v
new InsertSort(), t!LvV.g+
new BubbleSort(), 2vLn#
new SelectionSort(), #kA+Yqy\)
new ShellSort(), &M0v/!%L
new QuickSort(), ]MyWB<9M
new ImprovedQuickSort(), [o6d]i!
new MergeSort(), BN0))p
new ImprovedMergeSort(), |{(ynZ]R
new HeapSort() z\, w$Ef+
}; (J;<&v}Gad
:1Ay_b_J
public static String toString(int algorithm){ 4T"P#)z
return name[algorithm-1]; *(J<~:V?
} ;S/fe(C
=:DNb(
public static void sort(int[] data, int algorithm) { IN"qJ3<k
impl[algorithm-1].sort(data); E*zk?G|
} +9t@eHJT1
fsu'W]f
public static interface Sort { ]v#Q\Q8>
public void sort(int[] data); mb/Y
} .+.Pc_fv
Im2g2]
public static void swap(int[] data, int i, int j) { e5dwq
int temp = data; w$_ooQ(_;Q
data = data[j]; BTB,a$P/
data[j] = temp; JkTL+obu
} rz(DZV
} d{Z